A single-cylinder comprehensive test bench

Abstract

This invention belongs to the field of diesel engine testing technology and discloses a single-cylinder integrated test bench. The test bench includes a test frame, a high-pressure servo oil module, a low-pressure fuel module, a low-pressure lubricating oil module, a pump station control module, a test acquisition system, and an ECU control system. A high-pressure common rail is movably mounted on the test frame, connected to a booster pump and a fuel injection pump. The exhaust valve of the test sample is connected to the high-pressure common rail, the fuel injector of the test sample is connected to the booster pump, and the fuel injector of the test sample is connected to the fuel injection pump. The high-pressure servo oil module is connected to the high-pressure common rail; the low-pressure fuel module is connected to the booster pump; the low-pressure lubricating oil module is connected to the fuel injection pump; and the test acquisition system is connected to the high-pressure common rail and the pump station control module. This single-cylinder integrated test bench improves testing efficiency and reduces testing costs.

Description

Technical Field

[0001] This invention relates to the field of diesel engine testing technology, and in particular to a single-cylinder integrated test bench. Background Technology

[0002] In marine diesel engines, electronic fuel injection and control technology is one of the core technologies. The fuel system, hydraulic system, lubrication system, and electronic control system of marine low-speed diesel engines are designed using tools such as digital simulation and analog programming. However, these methods are insufficient. Firstly, the fuel system, hydraulic system, lubrication system, and electronic control system consist of three important subsystems: fuel injection, exhaust valve control, and cylinder fuel injection. Each subsystem functions independently, but their responses must be strictly matched to meet the requirements for normal operation of the diesel engine. Secondly, the three subsystems interact through the common rail hydraulic system, introducing uncertainty into the overall system's operation. Therefore, rigorous testing and verification are indispensable during system development. From component response research and analysis to subsystems and then to the overall system, meticulous testing and verification are required to develop a stable electronic fuel injection system.

[0003] However, existing test platforms cannot meet the requirements. Multiple test platforms need to be used to match different components under test, resulting in high test costs, low efficiency, and the inability to achieve platform test research at the whole system level.

[0004] Therefore, there is an urgent need for a single-cylinder integrated test bench to improve testing efficiency and reduce testing costs. Summary of the Invention

[0005] One objective of this invention is to provide a single-cylinder integrated test bench that improves testing efficiency and reduces testing costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A single-cylinder integrated test bench, comprising:

[0008] A test bench is provided, on which a high-pressure common rail is movably installed. The high-pressure common rail is connected to a booster pump and an injection pump. The exhaust valve in the test sample is connected to the high-pressure common rail, the injector in the test sample is connected to the booster pump, and the injection gun in the test sample is connected to the injection pump.

[0009] A high-pressure servo oil module is connected to the high-pressure common rail. The high-pressure servo oil module is used to supply high-pressure servo oil to the high-pressure common rail as a power source for the actuator.

[0010] A low-pressure fuel module is connected to the booster pump, and the low-pressure fuel module is used to supply fuel to the booster pump.

[0011] A low-pressure lubricating oil module is connected to the oil injection pump, and the low-pressure lubricating oil module is used to provide lubricating oil to the oil injection pump;

[0012] The pump station control module is connected to the high-pressure servo oil module, the low-pressure fuel oil module, and the low-pressure lubricating oil module. The pump station control module is used to control the operation of the high-pressure servo oil module, the low-pressure fuel oil module, and the low-pressure lubricating oil module.

[0013] The test acquisition system is connected to the high-pressure common rail and the pump station control module. The test acquisition system is used to acquire information about the high-pressure servo oil in the high-pressure common rail and the control information of the pump station control module.

[0014] The ECU control system is connected to the first control valve on the exhaust valve, the boost valve on the boost pump, and the second control valve on the oil injection pump.

[0015] As an optional technical solution, the test bench is provided with an oil collecting bottom shell, and the high-pressure servo oil module, the low-pressure fuel oil module and the low-pressure lubricating oil module are all installed on the oil collecting bottom shell.

[0016] As an optional technical solution, an alarm is installed on the oil collecting sump.

[0017] As an optional technical solution, a safety door is provided on the side of the test bench, and the safety door abuts against the start switch of the single-cylinder integrated test bench.

[0018] As an optional technical solution, the single-cylinder integrated test bench also includes a cooling module, which includes a fuel cooling system and a servo oil cooling system. Both the fuel cooling system and the servo oil cooling system are independent cooling pump stations. The fuel cooling system is used to cool the fuel supplied by the low-pressure fuel module, and the servo oil cooling system is used to cool the high-pressure servo oil supplied by the high-pressure servo oil module.

[0019] As an optional technical solution, the test bench is equipped with a lighting device and a monitoring camera.

[0020] As an optional technical solution, the bottom of the test bench is equipped with a shock absorber.

[0021] As an optional technical solution, the single-cylinder integrated test bench also includes an adapter, which is installed on the high-pressure common rail, the booster pump, and the oil injection pump.

[0022] As an optional technical solution, an operation panel is installed on the test bench, and the operation panel is electrically connected to the pump station control module, the test acquisition system, and the ECU control system.

[0023] As an optional technical solution, a contact switch is provided on the high-pressure common rail pipe. The contact switch contacts the test specimen at a preset position to start the single-cylinder integrated test bench.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention provides a single-cylinder integrated test bench. When the exhaust valve needs to be tested, the ECU control system opens the exhaust valve, and the test acquisition system collects the exhaust valve's operating data. When the fuel injector needs to be tested, the ECU control system starts the boost pump, which pressurizes the fuel supplied by the low-pressure fuel module and pumps the pressurized fuel to the fuel injector, which then injects fuel. The test acquisition system collects the fuel injector's operating data. When the fuel filler gun needs to be tested, the ECU control system starts the fuel filler pump, which pressurizes the lubricating oil supplied by the low-pressure lubricating oil module and pumps the pressurized lubricating oil to the fuel filler gun, which then injects fuel. The test acquisition system collects the fuel filler gun's operating data. The single-cylinder integrated test bench of the present invention can perform comprehensive tests on injectors, exhaust valves, and fuel injection guns. For example, it can test the fuel injection of the injectors, the exhaust pressure of the exhaust valves, and the lubrication effect of the fuel injection guns. It can also complete special tests of components before engine assembly, joint speed regulation tests, fuel injection quantity calibration tests of injectors, ECU function verification, durability tests, and reliability index verification. The single-cylinder integrated test bench of the present invention has a high degree of integration, complete functions, and reliable operation. Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments;

[0027] Figure 1 This is a frame diagram of the single-cylinder integrated test bench described in the embodiment;

[0028] Figure 2 This is a schematic diagram illustrating the working principle of the high-pressure servo oil module described in the embodiment.

[0029] Figure 3 This is a schematic diagram illustrating the working principle of the low-pressure fuel module described in the embodiment;

[0030] Figure 4 This is a schematic diagram illustrating the working principle of the low-pressure lubricating oil module described in the embodiment.

[0031] Figure 5 This is a partial structural schematic diagram of the test bench described in the embodiment;

[0032] Figure 6This is a schematic diagram of the oil collecting sump as described in the embodiment;

[0033] Figure 7 This is a top view of the high-pressure common rail pipe, common rail support, and connecting block described in the embodiment;

[0034] Figure 8 This is a front view of the high-pressure common rail pipe, common rail support, and connecting block described in the embodiment;

[0035] Figure 9 This is a schematic diagram of the structure of the visualized fuel tank described in the embodiment;

[0036] Figure 10 This is a first-view structural schematic diagram of the oil collection tank described in the embodiment;

[0037] Figure 11 This is a structural schematic diagram of the oil collection tank from a second perspective, as described in the embodiment.

[0038] Figure 12 This is a first-view structural diagram of the signal switching module described in the embodiment;

[0039] Figure 13 This is a second-view structural schematic diagram of the signal switching module described in the embodiment.

[0040] In the picture:

[0041] 1. Test bench; 11. Oil collection bottom shell; 12. Safety cover door; 2. High-pressure common rail pipe; 3. Common rail bracket; 4. Connecting block; 5. Visual oil tank; 6. Oil collection tank; 7. Signal conversion module. Detailed Implementation

[0042] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0047] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] like Figures 1 to 13As shown, this embodiment provides a single-cylinder integrated test bench, which includes a test bench frame 1, a high-pressure servo oil module, a low-pressure fuel module, a low-pressure lubricating oil module, a pump station control module, a test acquisition system, and an ECU control system. A high-pressure common rail 2 is movably mounted on the test bench frame 1, and the high-pressure common rail 2 is connected to a booster pump and a fuel injection pump. The exhaust valve of the test sample is connected to the high-pressure common rail 2, the fuel injector of the test sample is connected to the booster pump, and the fuel injection gun of the test sample is connected to the fuel injection pump. The high-pressure servo oil module is connected to the high-pressure common rail 2 and is used to provide high-pressure servo oil to the high-pressure common rail 2 as a power source for the actuator. The low-pressure fuel module is connected to... The booster pump is connected, and the low-pressure fuel module supplies fuel to the booster pump; the low-pressure lubricating oil module is connected to the injection pump, and supplies lubricating oil to the injection pump; the pump station control module is connected to the high-pressure servo oil module, the low-pressure fuel module, and the low-pressure lubricating oil module, and controls the operation of these modules; the test acquisition system is connected to the high-pressure common rail 2 and the pump station control module, and acquires information about the high-pressure servo oil in the high-pressure common rail 2 and the control information from the pump station control module; the ECU control system is connected to the first control valve on the exhaust valve, the booster valve on the booster pump, and the second control valve on the injection pump.

[0049] Specifically, the high-pressure servo oil module includes a low-pressure servo oil pump station, a servo oil pump, and a pressure control valve; the low-pressure fuel module includes a low-pressure fuel pump station; the low-pressure lubricating oil module includes a low-pressure cylinder lubricating oil pump station; the test and acquisition system includes an acquisition and output module, test and control software, and a signal conversion module 7; and the high-pressure common rail 2 is connected to the exhaust valve via a drive unit. When the exhaust valve needs to be tested, the ECU control system opens the exhaust valve, and the test and acquisition system collects the exhaust valve's operating data. Specifically, when the first control valve opens, the plunger in the exhaust valve's control unit moves upward, pushing the upper hydraulic oil to open the exhaust valve. When the injector needs to be tested, the ECU control system starts the booster pump, which pressurizes the fuel supplied by the low-pressure fuel module and pumps the pressurized fuel to the injector, which then injects fuel. The test and acquisition system collects the injector's operating data. Specifically, when the booster valve on the booster pump opens, the booster plunger moves upward, the suction valve closes, and the needle valve is closed under the action of the spring and hydraulic oil. The low-pressure fuel above the booster piston is compressed to form high pressure, ready for injection. When the injection valve opens, the force on the upper part of the needle valve push rod disappears, the needle valve lifts, and fuel injection begins. After the injection valve closes, the needle valve returns to its seat under the action of the spring and hydraulic oil, stopping fuel injection. When the fuel injector needs to be tested, the ECU control system starts the fuel injector pump. The fuel injector pump pressurizes the lubricating oil provided by the low-pressure lubricating oil module and pumps the pressurized lubricating oil to the fuel injector. The fuel injector injects oil into the oil collection tank 6. At this time, the test acquisition system collects the operating data of the fuel injector. When the second control valve on the fuel injector pump opens, the plunger in the lubricating oil pump moves upward, driving the evenly distributed pistons to pump the low-pressure lubricating oil to the fuel injector. When the injection pressure reaches the opening pressure of the one-way valve, the fuel injector opens, and at the same time, it pushes the upper hydraulic oil to open the exhaust valve. The single-cylinder integrated test bench of this embodiment can perform comprehensive tests on injectors, exhaust valves, and fuel guns. For example, it can test the fuel injection of the injectors, the exhaust pressure of the exhaust valves, and the lubrication effect of the fuel guns. It can also complete special tests of components before engine assembly, joint speed regulation tests, fuel injection quantity calibration tests of injectors, ECU function verification, durability tests, and reliability index verification. The single-cylinder integrated test bench of this embodiment has a high degree of integration, complete functions, and reliable operation.

[0050] In this embodiment, the signal acquisition and sensor signals of the single-cylinder integrated test bench are uniformly integrated on an interactive panel. The interface adopts a BNC interface, which can be easily connected to oscilloscopes and mainstream data acquisition instruments for debugging and calibration. The mechanical interface of the single-cylinder integrated test bench has good compatibility. After upgrading and modification, the single-cylinder integrated test bench can be used to conduct special tests on mainstream fuel systems, hydraulic systems and lubrication systems.

[0051] In this embodiment, the test bench 1 is equipped with a cable tray for wiring, and a ball valve is installed at the commonly disassembled oil port to facilitate the disassembly and replacement of components in daily use.

[0052] In this embodiment, the high-pressure common rail pipe 2 can be slidably adjusted along the X-axis, Y-axis and Z-axis directions on the test bench 1, so that the position of the high-pressure common rail pipe 2 can be flexibly adjusted.

[0053] In this embodiment, a common rail support 3 is provided on the test bench 1, and the high-pressure common rail pipe 2 is slidably mounted on the common rail support 3 along the X-axis, Y-axis and Z-axis directions via a connecting block 4.

[0054] In this embodiment, an oil collection tank 11 is provided inside the test bench 1, and the high-pressure servo oil module, low-pressure fuel module, and low-pressure lubricating oil module are all installed on the oil collection tank 11. If there is any oil leakage from the high-pressure servo oil module, low-pressure fuel module, or low-pressure lubricating oil module, it will be collected by the oil collection tank 11.

[0055] In this embodiment, an alarm is provided on the oil collecting sump 11. The alarm is specifically a buzzer.

[0056] In this embodiment, the single-cylinder integrated test bench also includes a cooling module, which comprises a fuel cooling system and a servo oil cooling system. Both systems are independent cooling pump stations. The fuel cooling system cools the fuel supplied by the low-pressure fuel module, while the servo oil cooling system cools the high-pressure servo oil supplied by the high-pressure servo oil module. The fuel tanks of the low-pressure fuel module and the low-pressure lubricating oil module are equipped with natural air cooling and heating modules. In winter when temperatures are low, the heating module can be used; in summer when temperatures are high, forced cooling is achieved using the fuel cooling system and the servo oil cooling system, effectively reducing system energy consumption.

[0057] In this embodiment, both the fuel tank of the low-pressure fuel module and the fuel tank of the low-pressure lubricating oil module are equipped with filtration systems to ensure the cleanliness of the oil. Both the fuel tank of the low-pressure fuel module and the fuel tank of the low-pressure lubricating oil module are visible fuel tanks 5.

[0058] In this embodiment, both the fuel tank of the low-pressure fuel module and the fuel tank of the low-pressure lubricating oil module are equipped with level gauges.

[0059] In this embodiment, the test bench 1 is equipped with a lighting device and a monitoring camera.

[0060] In this embodiment, a vibration damper is provided at the bottom of the test bench 1. The vibration damper can reduce the measurement error caused by the vibration of the single-cylinder integrated test bench during the test.

[0061] In this embodiment, the single-cylinder integrated test bench also includes adapters. Adapters are installed on the high-pressure common rail 2, the booster pump, and the fuel injection pump. By replacing different adapters, the single-cylinder integrated test bench can test various models of test objects. For example, the cylinder head of the single-cylinder integrated test bench is equipped with a fuel injection adapter, which can be adapted to multiple models of fuel injectors.

[0062] In this embodiment, a transparent oil collection cover is installed under the cylinder head of the single-cylinder integrated test bench, allowing observation of the static dripping and dynamic spraying of the injector. Furthermore, the transparent oil collection cover can be combined with a high-speed camera to visualize the spraying under atmospheric pressure. In this embodiment, the high-speed camera is a surveillance camera.

[0063] In this embodiment, the transparent oil collection cover has an oil mist alarm function. When the oil mist temperature inside the transparent oil collection cover is too high, the alarm will sound and the single-cylinder integrated test bench will stop operating.

[0064] In this embodiment, the safety cover door 12 of the single-cylinder integrated test bench is located on the side of the test bench frame 1. When the safety cover door 12 is opened, a mechanical interlock function is triggered, and the single-cylinder integrated test bench stops operating to protect the operator's safety. At this time, the operator can disassemble and repair components inside the test bench frame 1, such as the high-pressure servo oil module, the low-pressure fuel module, and the low-pressure lubricating oil module. In this embodiment, the safety cover door 12 abuts against the start switch of the single-cylinder integrated test bench.

[0065] In this embodiment, an operation panel is installed on the test bench 1. The operation panel is electrically connected to the pump station control module, the test acquisition system, and the ECU control system. The operation panel in this embodiment is an interactive panel, allowing the operator to perform local start / stop, emergency stop, speed setting, and overspeed alarm functions on the test bench 1 from one side.

[0066] In this embodiment, a contact switch is installed on the high-pressure common rail 2. The contact switch contacts the test specimen at a preset position to start the single-cylinder integrated test bench. When the test specimen is not installed in the preset position of the single-cylinder integrated test bench, the contact switch is not triggered, thereby preventing the single-cylinder integrated test bench from starting and avoiding accidental start-up due to the omission of the test specimen.

[0067] This embodiment of the single-cylinder integrated test bench is suitable for conducting comprehensive tests and individual component performance tests on independently developed turbocharged fuel injection systems, hydraulic systems, and lubrication systems; it can meet the hardware-in-the-loop test conditions of the electronic control system; it can flexibly adjust the low-pressure fuel supply pressure, low-pressure lubricating oil pressure, and high-pressure servo oil pressure; it can simulate the crankshaft speed of the main engine and adjust the speed input signal of the ECU control system; it can provide a reference signal that can be transmitted to the single injector, enabling joint testing with the injection rate test bench; it can simultaneously perform injection tests of two injectors, and through a visualized fuel tank, the injection and cone surface density of the injectors can be observed. The system features a sealed interface; the test acquisition system unifies ECU control signals and sensor signals onto a single interactive panel, using a unified BNC interface for easy connection to oscilloscopes and mainstream data acquisition instruments for debugging and calibration; it boasts a high degree of structural integration, with throttle valves and distribution blocks integrated into the testing equipment, reducing the number of fuel supply devices, lowering costs, and ensuring the accuracy and safety of test conditions; it can monitor and test key technical parameters such as pressure, temperature, and displacement of the test sample, enabling performance analysis and simulation calibration of the system; and it can simultaneously sample key technical indicators of the injectors, with data available for subsequent consistency analysis.

[0068] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A single-cylinder comprehensive test bench, characterized in that, include: A test bench is provided, on which a high-pressure common rail is movably installed. The high-pressure common rail is connected to a booster pump and an injection pump. The exhaust valve in the test sample is connected to the high-pressure common rail, the injector in the test sample is connected to the booster pump, and the injection gun in the test sample is connected to the injection pump. A high-pressure servo oil module is connected to the high-pressure common rail. The high-pressure servo oil module is used to supply high-pressure servo oil to the high-pressure common rail as a power source for the actuator. A low-pressure fuel module is connected to the booster pump, and the low-pressure fuel module is used to supply fuel to the booster pump. A low-pressure lubricating oil module is connected to the oil injection pump, and the low-pressure lubricating oil module is used to provide lubricating oil to the oil injection pump; The pump station control module is connected to the high-pressure servo oil module, the low-pressure fuel oil module, and the low-pressure lubricating oil module. The pump station control module is used to control the operation of the high-pressure servo oil module, the low-pressure fuel oil module, and the low-pressure lubricating oil module. The test acquisition system is connected to the high-pressure common rail and the pump station control module. The test acquisition system is used to acquire information about the high-pressure servo oil in the high-pressure common rail and the control information of the pump station control module. The ECU control system is connected to the first control valve on the exhaust valve, the boost valve on the boost pump, and the second control valve on the oil injection pump. The test bench is equipped with an oil collection bottom shell, and the high-pressure servo oil module, the low-pressure fuel oil module, and the low-pressure lubricating oil module are all installed on the oil collection bottom shell; The test bench is provided with a safety door on its side, and the safety door abuts against the start switch of the single-cylinder integrated test bench; The high-pressure common rail is equipped with a contact switch, which contacts the test specimen at a preset position to start the single-cylinder integrated test bench; The single-cylinder integrated test bench is equipped with a transparent oil collection cover for observing the static dripping and dynamic spraying of the injector.

2. The single-cylinder integrated test bed of claim 1, wherein An alarm is installed on the oil collecting sump.

3. The single cylinder integrated test stand of claim 1, wherein, The single-cylinder integrated test bench also includes a cooling module, which includes a fuel cooling system and a servo oil cooling system. Both the fuel cooling system and the servo oil cooling system are independent cooling pump stations. The fuel cooling system is used to cool the fuel supplied by the low-pressure fuel module, and the servo oil cooling system is used to cool the high-pressure servo oil supplied by the high-pressure servo oil module.

4. The single cylinder integrated test stand of claim 1, wherein, The test bench is equipped with lighting devices and monitoring cameras.

5. The single-cylinder integrated test bench according to claim 1, characterized in that, The bottom of the test bench is equipped with a shock absorber.

6. The single-cylinder integrated test bench according to claim 1, characterized in that, The single-cylinder integrated test bench also includes an adapter, which is installed on the high-pressure common rail, the booster pump, and the oil injection pump.

7. The single-cylinder integrated test bench according to claim 1, characterized in that, An operation panel is installed on the test bench, and the operation panel is electrically connected to the pump station control module, the test acquisition system, and the ECU control system.

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