An engine oil loading and injection experimental device

Abstract

The present invention discloses an engine oil loading injection test device, comprising an engine for simulating an engine, an oil tank for storing oil; the first input end of the oil tank is connected to the output end of the three-way regulating valve in sequence through a two-way regulating valve; the first input end of the three-way regulating valve is connected to the output end of the gear pump through an oil filter; the input end of the gear pump is connected to an external oil storage device through a refueling ball valve; the output end of the three-way regulating valve is also connected through an injection solenoid valve; the output end of the injection solenoid valve is connected to the input end of the oil inner cavity; the first output end of the oil tank is connected to the input end of the gear pump through an oil return ball valve. The device can realize the switching of functions by opening and closing different valves, and can not only be used as a supply device for high-temperature oil and high-pressure oil that meet the test requirements for various reliability tests of the engine, but also can be used for engine oil injection target shooting tests and dynamic engine fuel supply system pressure loading tests.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to an engine oil loading and injection experimental device. Background Art

[0002] The engine oil in the engine lubrication system serves as the engine's lubricant. It not only lubricates parts, reduces component wear, and extends the service life of the engine, but also has functions such as cooling, cleaning, sealing, corrosion prevention, and anti-oxidation. It can improve the engine's operating condition and improve the engine's fuel economy.

[0003] Some high-horsepower diesel engines often use oil injection cooling systems to cool and lubricate the engine pistons and cylinders: the oil pump pumps the oil in the oil pan at the bottom of the engine into the oil pipeline, flows through the oil filter attached to the cooling device, and the filtered and cooled oil is sent to the main oil channel. After lubricating the camshaft and crankshaft, it enters the auxiliary oil channel and is sprayed onto the piston surface by the high-pressure nozzle on the cylinder body to help the piston dissipate heat and lubricate quickly. As the heat load of high-horsepower engine pistons on the market becomes higher and higher, the requirements for cooling and lubrication are constantly increasing: the oil must not only be sprayed onto the piston surface, but also accurately enter the cooling oil channel of the piston body, resulting in higher requirements for the angle of the nozzle. Once the injection angle is offset, the oil cannot be accurately injected into the piston oil channel, which will affect the cooling effect of the piston. If the piston is not cooled well for a long time, it will cause neck ablation and even cylinder pulling.

[0004] To obtain a reasonable injection angle, an oil injection target test must be conducted, which requires the use of a special test device, which simulates the working state of the oil injection cooling system of an actual engine, and adjusts the oil pressure, temperature, and flow rate before injecting it into the cylinder piston. Observe and detect the oil injection trajectory, and continuously adjust the oil nozzle position and angle to obtain the optimal injection angle and nozzle position. This type of device must meet the following performance requirements:

[0005] 1. The oil supply pressure is adjustable within the range of 0.3-1.2MPa;

[0006] 2. The designed oil supply flow rate must be greater than 30L / min;

[0007] 3. The oil temperature is easily adjustable in the range of 30 to 120°C and heats up quickly.

[0008] 4. The device must have an oil filter to ensure the cleanliness of the oil and realize the recycling of the engine oil.

[0009] An invention disclosed by Nanjing Automobile Group Co., Ltd., "Test Bench Fuel Supply Pressure Stabilization System" (ZL200610085744.3), includes a fuel tank, an air source unit, and a pneumatic pressure stabilization unit. The pneumatic pressure stabilization unit includes a pneumatic pump, a pressure relief unit and an adjustment unit. The fuel inlet of the pneumatic pump is connected to the fuel tank through a control valve. The pressure relief unit and the pressure regulating unit are arranged on the fuel outlet oil line of the pneumatic pump. The fuel input of the pressure relief unit is connected to the output of the pneumatic pump, and the output of the pressure relief unit flows back to the fuel tank; the fuel output of the pressure regulating unit transports fuel of the working pressure level to the outside in one way, and flows back to the fuel tank in the other way. Another invention of the China Aero-Power Machinery Research Institute, the "Engine Fuel Supply Test Device" (ZL200820053243.1), discloses a vacuum pump, a fuel tank, a circulation pump, a pipe heater and a control system. The fuel tank is provided with a pressure sensor, a temperature sensor and an oil level sensor. The vacuum pump is connected to the fuel tank by an air pipe. The oil inlet pipe of the three-way pipe is provided with a circulation solenoid valve. The control system is connected with a pressure controller, a temperature controller and a liquid level controller.

[0010] The above two patented technologies both use the gas circuit to control the oil circuit: the former only adjusts the output oil pressure and has an oil pressure over-protection device, but cannot adjust the oil temperature, and does not have a self-protection device when the system is short of oil; while the latter can automatically control the oil pressure, oil temperature and oil replenishment in the fuel tank through the coordination of the vacuum pump and the gas filling valve, and circulate heating to achieve automatic control of oil pressure, oil temperature and liquid level, but its high-pressure oil is directly placed in the oil tank, and the oil tank needs to use high-strength pressure-resistant materials, which is costly and has safety hazards. In addition, both patented technologies use the gas circuit to control the oil circuit, which has high requirements for the sealing of the equipment and is not easy to repair. Summary of the invention

[0011] The purpose of the present invention is to provide an engine oil loading injection test device

[0012] The present invention is achieved according to the following technical solutions:

[0013] An engine oil loading and injection experimental device comprises an engine for simulating an engine and an oil tank for storing engine oil; the engine is provided with an engine oil inner cavity;

[0014] The first input end of the oil tank is connected to the output end of the three-way regulating valve through the two-way regulating valve in sequence; the first input end of the three-way regulating valve is connected to the output end of the gear pump through the oil filter;

[0015] The input end of the gear pump is connected to an external oil storage device through a refueling ball valve;

[0016] The output end of the three-way regulating valve also passes through an injection solenoid valve; the output end of the injection solenoid valve is connected to the input end of the engine oil cavity;

[0017] The first output end of the engine oil tank is connected to the input end of the gear pump through an oil return ball valve.

[0018] Furthermore, the device also includes a PID pressure regulating artificial intelligence industrial regulator;

[0019] A pressure gauge and an output oil temperature sensor are provided between the output end of the three-way regulating valve and the input end of the engine oil inner cavity; an output oil pressure sensor is provided at the input end of the two-way regulating valve;

[0020] The PID pressure regulating artificial intelligence industrial regulator is electrically connected to the two-way regulating valve and the output oil pressure sensor.

[0021] Furthermore, the device also includes a PID temperature-controlled artificial intelligence industrial regulator, a heat exchanger, a heater for heating the oil in the oil tank, and an oil temperature sensor in the oil tank for detecting the oil temperature in the oil tank; the heater, the three-way regulating valve, and the oil temperature sensor in the oil tank are all electrically connected to the PID temperature-controlled artificial intelligence industrial regulator;

[0022] The second output end of the oil tank is connected to the heat medium input end of the heat exchanger, and the heat medium output end of the heat exchanger is connected to the second input end of the three-way regulating valve; the refrigerant input end and the refrigerant output end of the heat exchanger are connected to the external cold water pipeline.

[0023] Furthermore, the engine comprises a fuel inner cavity connected to the output end of the three-way regulating valve, and an oil rail and a rail pressure sensor for detecting the oil pressure on the oil rail are arranged in the fuel inner cavity.

[0024] Furthermore, an oil nozzle connected to the output end of the injection solenoid valve is arranged in the engine; and the target area of ​​the oil nozzle in the cylinder body of the engine is composed of a plexiglass plate with markings.

[0025] Furthermore, an oil nozzle connected to the output end of the injection solenoid valve is arranged in the engine; and the target area of ​​the oil nozzle in the cylinder body of the engine is composed of a plexiglass plate with markings.

[0026] Furthermore, an overflow valve is provided on the pipeline between the second output end of the engine oil tank and the heat medium input end of the heat exchanger.

[0027] Furthermore, the engine oil tank is electrically connected to a float level switch, and the float level switch is electrically connected to the heater and the gear pump.

[0028] Furthermore, an exhaust port is provided at the upper end of the oil tank to connect the inner cavity of the oil tank with the atmosphere.

[0029] Furthermore, a liquid level gauge is also provided in the engine oil tank.

[0030] Through the above technology, the device has multiple functions, simple structure, safe operation, convenient maintenance and low cost; the pipeline can be switched by opening and closing different valves, and the gear pump can realize multiple functions. This device can not only be used as a supply device for high-temperature oil and high-pressure oil that meet the test requirements for various reliability tests of the engine, but also can independently perform engine oil injection target test and dynamic engine fuel supply system pressure loading test, realizing multiple functions of one set of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the engine oil loading injection experimental device;

[0032] Figure 2 Schematic diagram of the operation of filling the oil tank;

[0033] Figure 3 This is a schematic diagram of the oil tank pressurization operation;

[0034] Figure 4 This is a schematic diagram of the oil injection operation;

[0035] Figure 5 This is a schematic diagram of oil discharge operation;

[0036] Figure 6 This is a schematic diagram of the oil rail oil pressure test.

[0037] In the figure: oil drain valve 1; refueling ball valve 2; oil return ball valve 3; gear pump 4; overflow valve 5; oil temperature sensor in the tank 6; PID temperature control artificial intelligence industrial regulator 7; oil filter 8; PID pressure regulation artificial intelligence industrial regulator 9; heat exchanger 10; three-way regulator 11; pressure gauge 12; output oil pressure sensor 13; output oil temperature sensor 14; injection solenoid valve 15; two-way regulator 16; float liquid level switch 17; oil tank 18; liquid level gauge 19; exhaust port 20; heater 21; engine 22; oil nozzle 23; plexiglass plate 24; fuel inlet 25; oil rail 26; rail pressure sensor 27. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be understood as limiting the present invention and are only used as examples. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0039] like Figure 1As shown, the present invention is composed of a gear pump 4, an oil tank 18, a PID temperature control artificial intelligence industrial regulator 7, an oil filter 8, a PID pressure regulating artificial intelligence industrial regulator 9, a heat exchanger 10, a three-way regulator 11, an injection solenoid valve 15, a two-way regulator 16, and an oil nozzle 23 installed on the cylinder wall of an engine 22. The oil tank 18 has an exhaust port 20 on the top, a liquid level gauge 19 in the middle, a heater 21 and a float liquid level switch 17 on the side, and an oil drain valve 1 and a tank temperature sensor 6 at the bottom. They are connected by multiple oil pipes: a refueling ball valve 2 is installed at the oil inlet pipe, and a return oil ball valve 3 is installed on the return oil pipe. The high-pressure oil pipe behind the three-way regulator 11 is successively installed with an oil pressure gauge 12, an output oil pressure sensor 13, and an output oil temperature sensor 14, and an injection solenoid valve 15 is connected in series in the oil pipe leading to the engine.

[0040] Among them, the PID temperature control artificial intelligence industrial regulator 7 is used as a temperature control instrument in the device, one end of which is connected to the heating pipe 21 on the oil tank 18, and controls the operation or disconnection of the heating pipe after receiving the oil temperature signal in the tank from the tank temperature sensor 6 at the bottom of the oil tank 18, so that the oil temperature in the tank is guaranteed to fluctuate within 100±2℃. The other end is connected to the three-way regulating valve 11, and controls the opening of the three-way regulating valve 11 after receiving the temperature signal in the output oil pipe from the output oil temperature sensor 14, and controls the opening of the three-way regulating valve 11 after PID calculation, so that the oil in the main and auxiliary oil circuits are mixed in proportion (wherein, the main oil circuit is directly from the oil tank 18 The 100±2℃ high-temperature oil heated by the heating pipe 21, and the auxiliary oil circuit is low-temperature oil that has been water-cooled by the heat exchanger 10) so that the output oil temperature meets the set oil temperature (such as 80±2℃).

[0041] The PID pressure regulating artificial intelligence industrial regulator 9 is used as the pressure regulating instrument in the device and is connected to the two-way regulating valve 16. The PID pressure regulating artificial intelligence industrial regulator 9 receives the oil pressure information from the output oil pressure sensor 13, and controls the opening of the two-way regulating valve 16 after PID calculation, so that the oil pressure and flow in the output oil circuit change accordingly. When the valve opening becomes larger, the flow in the output oil circuit decreases and the oil pressure decreases; when the valve opening becomes smaller, the flow in the output oil circuit increases and the oil pressure increases. The oil pressure value in the output oil circuit is generally set by the experimenter according to the test requirements.

[0042] Two protection elements are provided in the device, one is the overflow valve 5 connected in parallel with the output oil pipe connecting the gear pump 4 and the oil tank 18, and the other is the float level switch 17 on the side of the oil tank 14. Among them, the overflow valve 5 is used as an overload protection element to control the oil pressure in the pipeline within a safe range and also to cut the peak of the oil pressure fluctuation. When the output oil pressure is greater than the warning oil pressure, the overflow valve opens and forces the pipeline to reduce pressure. As an oil quantity monitoring element of the test device, the float level switch 17 is connected to a heater at one end and a gear pump at the other end. When the oil quantity in the oil tank 18 is lower than the set lower limit, it forces the heating pipe and the gear pump to stop working to avoid damage to the equipment caused by idling of the gear pump and burning of the heater. When the oil in the oil tank 18 is higher than the set lower limit, the gear pump and the heating pipe are closed and work again. In addition, an exhaust port 20 is opened at the top of the oil tank 18 to ensure that the oil pressure in the oil tank 8 remains equivalent to the external atmospheric pressure, which is safe and reliable.

[0043] When this experimental device performs the refueling operation, Figure 2 As shown, the oil drain valve 1 and the oil return ball valve 3 are manually disconnected, the oil filling ball valve 2 and the two-way regulating valve 16 are closed, and the gear pump 4 is opened. Then, the oil in the external oil storage device is extracted through the gear pump 4, flows through the oil filling ball valve 2, the gear pump 4, the oil filter 8, the three-way regulating valve 11 and the two-way regulating valve 16 into the oil tank 18. The liquid level gauge 19 in the oil tank 18 shows the amount of oil in the oil tank. When the oil is almost full, the gear pump 4 is manually closed, the oil filling ball valve 2 is disconnected, and the oil filling is stopped. At the same time, the joint heater 21 works and the heating pipe starts to work. When the oil temperature sensor 6 in the tank shows that the oil temperature is higher than the maximum allowable value of 102°C, the PID temperature control artificial intelligence industrial regulator 7 forces the heating circuit to be disconnected, and the heater 21 stops heating; when the oil temperature sensor 6 in the tank shows that the oil temperature is lower than the minimum allowable value of 98°C, the PID temperature control artificial intelligence industrial regulator 7 connects the heating circuit again, and the heater 21 stops heating and starts heating the oil in the oil tank 18.

[0044] When this experimental device performs the refueling operation, Figure 3As shown, the oil drain valve 1 and the refueling ball valve 2 are disconnected, and the oil return ball valve 3 and the two-way regulating valve 16 are connected. The oil in the device forms a boost circuit through the gear pump 4, the oil filter 8, the three-way regulating valve 11, the two-way regulating valve 16, the oil tank 18, the oil return valve 3, and the refueling valve 2. Because the oil pressure in the oil circuit is lower than the set value, the two-way regulating valve 16 is still closed under the control of the PID pressure regulating artificial intelligence industrial regulator 9, and the oil in the circuit is static. At this time, the gear pump is started, and the oil pressure in the static oil circuit begins to rise. When the oil pressure sensor 13 measures that the oil pressure reaches the set value, it sends a signal to the PID pressure regulating artificial intelligence industrial regulator 9. At this time, the PID pressure regulating artificial intelligence industrial regulator 9 controls the two-way regulating valve 16 to open, and the oil begins to circulate in the boost circuit. The oil pressure at the output oil circuit end between the gear pump and the two-way regulating valve maintains a high pressure constant; at the same time, part of the high oil pressure oil is transmitted to the overflow valve. When the oil pressure at the output oil circuit end is higher than the set warning value, the overflow valve opens to drain the oil. However, since there is an exhaust port 20 at the top of the oil tank 18, the oil pressure of the oil flowing back from the output oil circuit to the oil tank 14 is reduced to the same as the external atmospheric pressure, thereby ensuring that the oil pressure in the oil tank 18 is normal and safe.

[0045] At the same time, due to the reciprocating flow of the engine oil, the engine oil heated by the heater 21 in the engine oil tank 4 also enters the supercharged oil circuit, and the oil temperature in the oil circuit is increased: the oil temperature in the main oil circuit flowing from the engine oil tank 4 through the return oil ball valve 3, the gear pump 4, the engine oil filter 8 to the main oil circuit inlet of the three-way regulating valve 11 is consistent with the oil temperature in the engine oil tank 4, and is maintained in the range of 100±2℃; and the engine oil in the auxiliary oil circuit that is diverted from the rear end of the gear pump 4 to the heat exchanger 10 to the auxiliary oil circuit inlet of the three-way regulating valve 11 is reduced to about 25℃ due to the water cooling effect of the heat exchanger 10. The high and low temperature engine oils in the main and auxiliary oil circuits are mixed in proportion in the three-way regulating valve 11, and the engine oil with the required test temperature of about 80±2℃ is output from the outlet.

[0046] Therefore, in the output oil section from the output oil temperature sensor 14 to the engine 22, we can obtain high-pressure constant temperature engine oil whose temperature and pressure meet the test requirements. A pressure gauge 12, an output oil temperature sensor 14 and an output oil pressure sensor 13 are installed in front of the output oil circuit in sequence. The output oil temperature sensor 14 feeds back the output oil temperature to the PID temperature control artificial intelligence industrial regulator 9, which performs PID calculation processing on the temperature signal, and the output signal controls the valve opening of the three-way regulating valve 11. This oil temperature feedback processing circuit ensures that the output oil temperature fluctuation range is within ±2°C; the output oil pressure sensor 13 feeds back the output oil pressure to the PID pressure regulating artificial intelligence industrial regulator 7, which performs PID calculation processing on the pressure signal, and outputs an electrical signal to control the valve opening of the two-way regulating valve 16. This oil pressure feedback processing circuit ensures that the output oil pressure fluctuation range is within ±0.05MPa.

[0047] This experimental device performs the oil injection operation as follows Figure 4 As shown, first remove the piston in the engine cylinder, plug all irrelevant oil passages, and install a glass plate 24 with a mark for the experiment. Then open the injection solenoid valve 15, and the constant temperature high pressure oil in the output oil section is input into the oil passage of the engine 22 cylinder, and bursts out through the oil nozzle 23 at a flow rate greater than 30L / min. Observe whether the oil sprayed from the oil nozzle 23 falls within the marked range of the organic glass plate 24, and ensure the oil landing point by constantly adjusting the position of the oil nozzle 23, and finally find the best position and angle. This is the engine oil injection target test.

[0048] When this experimental device performs the oil discharge operation, Figure 5 As shown, firstly, the gear pump 4, the heater 21, the oil filling ball valve 2, the oil return ball valve 3, and the two-way regulator 16 are all disconnected, so that all the oil circuits in the device are disconnected, and all the control circuits are powered off and stopped working. Then, the drain valve 1 at the bottom of the oil tank 18 is opened to drain the oil in the oil tank 18.

[0049] In addition to the engine oil injection target test, this experimental device can also perform engine oil temperature control test, engine oil loading test and dynamic engine fuel supply system pressure loading test. The specific operation methods of the first two items are the same as Figure 2 The refueling operation shown and Figure 3 The boost operation shown can directly obtain the required engine oil that meets the test requirements from the output oil circuit, and will not be described in detail.

[0050] The operation of this experimental device to perform the dynamic engine fuel supply system pressure loading test is as follows: first execute Figure 5 The oil draining operation shown in the figure drains the oil in the oil tank 18; then execute Figure 2 The refueling operation shown in the figure will fill the oil tank with the test fuel; then perform Figure 3 The boost operation shown warms and pressurizes the fuel; finally, follow the Figure 6 As shown, the high-temperature and high-pressure fuel in the output oil circuit is sent to the fuel rail 26 in the engine with a rail pressure sensor 27 through the fuel inlet 25 on the engine 22 by a fuel pipe. The PID temperature control artificial intelligence industrial regulator 9 is controlled by the oil temperature sensor 14 so that the fuel temperature in the output oil circuit is kept in the range of 40℃±2℃. At the same time, the valve opening of the two-way regulator 16 is controlled by the PID pressure regulating artificial intelligence industrial regulator 7 so that the fuel pressure in the output oil circuit increases from 0.3 kg to 7 kg. Then, the oil pressure change signals of the oil pressure sensor 13 and the rail pressure sensor 27 in the boost oil circuit are extracted respectively, and the influence of the oil inlet pressure fluctuation and size on the engine rail pressure fluctuation is analyzed, which is the dynamic engine fuel supply system pressure loading test.

[0051] The above are all prior art without detailed description.

Claims

1. An engine oil loading injection test device, characterized in that: It comprises an engine (22) for simulating an engine and an oil tank (18) for storing engine oil; the engine (22) is provided with an oil inner cavity; The first input end of the engine oil tank (18) is connected to the output end of the three-way regulating valve (11) via the two-way regulating valve (16); the first input end of the three-way regulating valve (11) is connected to the output end of the gear pump (4) via the engine oil filter (8); The input end of the gear pump (4) is connected to an external oil storage device via a refueling ball valve (2); The output end of the three-way regulating valve (11) is also connected through an injection solenoid valve (15); the output end of the injection solenoid valve (15) is connected to the input end of the engine oil inner cavity; The first output end of the engine oil tank (18) is connected to the input end of the gear pump (4) via an oil return ball valve (3); It also includes PID pressure regulating artificial intelligence industrial regulator (9); A pressure gauge (12) and an output oil temperature sensor (14) are provided between the output end of the three-way regulating valve (11) and the input end of the engine oil inner cavity; an output oil pressure sensor (13) is provided at the input end of the two-way regulating valve (16); The PID pressure regulating artificial intelligence industrial regulator (9) is electrically connected to the two-way regulating valve (16) and the output oil pressure sensor (13); It also includes a PID temperature-controlled artificial intelligence industrial regulator (7), a heat exchanger (10), a heater (21) for heating the oil in the oil tank (18), and an oil temperature sensor (6) for detecting the oil temperature in the oil tank (18); the heater (21), the three-way regulating valve (11), and the oil temperature sensor (6) are all electrically connected to the PID temperature-controlled artificial intelligence industrial regulator (7); The second output end of the engine oil tank (18) is connected to the heat medium input end of the heat exchanger (10), and the heat medium output end of the heat exchanger (10) is connected to the second input end of the three-way regulating valve (11); the refrigerant input end and the refrigerant output end of the heat exchanger (10) are connected to an external cold water pipeline; An overflow valve (5) is provided on the pipeline between the second output end of the engine oil tank (18) and the heat medium input end of the heat exchanger (10); The engine oil tank (18) is electrically connected to a float liquid level switch (17), and the float liquid level switch (17) is electrically connected to the heater (21) and the gear pump (4).

2. The engine oil loading injection test device according to claim 1, characterized in that: The engine (22) comprises a fuel inner cavity connected to the output end of the three-way regulating valve (11), wherein an oil rail (26) and a rail pressure sensor (27) for detecting the oil pressure on the oil rail are arranged in the fuel inner cavity.

3. The engine oil loading injection test device according to claim 2, characterized in that: An oil nozzle (23) connected to the output end of the injection solenoid valve (15) is arranged in the engine (22); a target area of ​​the cylinder body of the engine (22) for injection by the oil nozzle (23) is formed by a plexiglass plate (24) with markings.

4. The engine oil loading injection test device according to claim 1, characterized in that: An oil nozzle (23) connected to the output end of the injection solenoid valve (15) is arranged in the engine (22); a target area of ​​the cylinder body of the engine (22) for injection by the oil nozzle (23) is formed by a plexiglass plate (24) with markings.

5. The engine oil loading injection test device according to any one of claims 1 to 3, characterized in that: The upper end of the engine oil tank (18) is provided with an exhaust port (20) for connecting the inner cavity of the engine oil tank (18) with the atmosphere.

6. The engine oil loading injection test device according to any one of claims 1 to 3, characterized in that: A liquid level gauge (19) is also provided in the engine oil tank (18).

Images