A device for detecting reliability of a high-pressure oil pump of an automobile

Abstract

The utility model discloses a kind of automobile high-pressure oil pump reliability detection devices, involve engine field.The automobile high-pressure oil pump reliability detection device, including strain gauge, slip ring, data logger and PC its characterized in that, the strain gauge is pasted in high-pressure oil pump shaft rear end, for measuring the stress of oil pump shaft, the slip ring is connected with strain gauge, for transmission strain gauge's electric signal;The signal processing assembly is connected to the slip ring, and it is connected with data logger by signal processing assembly, the data logger is connected with PC, data logger is used to record signal, PC is used to process record data.The automobile high-pressure oil pump reliability detection device, at least 2 pieces of strain gauge are pasted symmetrically in high-pressure oil pump shaft rear end, transmission signal is combined slip ring, can accurately capture the stress change of oil pump shaft;Signal processing assembly, which is composed of strain gauge bridge box and amplifier, can effectively convert and amplify signal, ensure data reliability.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, specifically to a reliability testing device for automotive high-pressure oil pumps. Background Technology

[0002] The high-pressure fuel pump in an automotive engine is a core component of the fuel supply system, and its reliability directly affects the normal operation of the engine. If key components of the high-pressure fuel pump, such as the vane pump and shaft, fail, it may cause metal filings to fall off and block the one-way valve in the high-pressure fuel circuit, leading to serious malfunctions such as abnormal rail pressure and vehicle stalling.

[0003] In existing technologies, the verification of high-pressure oil pump reliability largely relies on long-term platform testing. This not only makes it difficult to accurately capture the stress state of key components such as the pump shaft under complex operating conditions, but also results in long verification cycles and high costs. Therefore, there is an urgent need for a testing device that can accurately measure the stress parameters of key components of high-pressure oil pumps and is adaptable to various operating condition simulations, in order to support efficient assessment and rapid verification of their reliability. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a reliability testing device for automotive high-pressure oil pumps, solving the problem that existing technologies struggle to accurately obtain key stress parameters such as stress and torque of high-pressure oil pumps (especially pump shafts) under different operating conditions, leading to inaccurate reliability assessments and low verification efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reliability testing device for an automotive high-pressure oil pump, comprising a strain gauge, a slip ring, a data logger, and a PC. The strain gauge is attached to the rear end of the high-pressure oil pump shaft for measuring the stress on the pump shaft. The slip ring is connected to the strain gauge for transmitting the electrical signal from the strain gauge. The slip ring is connected to a signal processing component and is connected to the data logger via the signal processing component. The data logger is connected to the PC, which records the signal, and the PC processes the recorded data.

[0006] Preferably, the signal processing component includes a strain gauge bridge box, an amplifier, and a junction box; the slip ring is connected to the strain gauge bridge box, and the strain gauge bridge box is connected to the data logger through the amplifier; the strain gauge bridge box converts the strain gauge signal into a bridge signal, the amplifier amplifies the bridge signal, and transmits the signal to the data logger.

[0007] Preferably, it also includes a pressure sensor, which is installed on the high-pressure oil line and collects pressure signals; and the pressure sensor is connected to the data logger through a signal processing component.

[0008] Preferably, it also includes an ECU, which is connected to the engine and controls the engine speed and load.

[0009] Preferably, it also includes a fuel supply assembly, which includes an electronic fuel pump and a fuel tank; the fuel tank is connected to a high-pressure fuel pump via the electronic fuel pump to supply fuel to the high-pressure fuel pump.

[0010] Preferably, it also includes a power supply component, which includes a DC power supply and an AC220V power supply. The DC power supply is connected to the electronic oil pump, and the AC220V power supply is connected to an amplifier, a data logger, and a PC.

[0011] Preferably, there are at least two strain gauges, which are symmetrically attached to the radial sides of the rear end of the high-pressure oil pump shaft.

[0012] Preferably, it also includes an engine speed sensor, which is connected to the engine and collects engine speed signals, and is connected to a data logger through a signal processing component.

[0013] Its beneficial effects are as follows: 1. This automotive high-pressure oil pump reliability testing device accurately captures stress changes in the oil pump shaft by symmetrically attaching at least two strain gauges to the rear end of the high-pressure oil pump shaft and transmitting signals using slip rings. The signal processing component, consisting of a strain gauge bridge box and an amplifier, effectively converts and amplifies the signal, ensuring data reliability.

[0014] 2. This automotive high-pressure oil pump reliability testing device, with the help of the ECU, can precisely control the engine speed and load. Combined with the electronic oil pump, oil tank, DC power supply and AC220V power supply, it can stably simulate various actual operating conditions. It collects high-pressure oil circuit pressure through a pressure sensor and engine speed signals through an engine speed sensor, and transmits these signals synchronously with the stress signals from strain gauges to a data logger, enabling correlation analysis between operating conditions and stress parameters. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] In the diagram: 1. Strain gauge; 2. Slip ring; 3. ECU; 4. Junction box; 5. Strain gauge bridge box; 6. Amplifier; 7. Data logger; 8. Pressure sensor; 9. Electronic oil pump; 10. PC; 11. Oil tank; 12. DC power supply; 13. AC220V power supply. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] This utility model discloses a reliability testing device for automotive high-pressure oil pumps, according to the attached... Figure 1 As shown, the system includes a strain gauge 1, a slip ring 2, a data logger 7, and a PC10. The strain gauge 1 is attached to the rear end of the high-pressure oil pump shaft to measure the stress on the pump shaft. The slip ring 2 is connected to the strain gauge 1 and is used to transmit the electrical signal from the strain gauge 1. The slip ring 2 is connected to a signal processing component and is connected to the data logger 7 through the signal processing component. The data logger 7 is connected to the PC10. The data logger 7 is used to record signals, and the PC10 is used to process the recorded data.

[0021] By symmetrically attaching at least two strain gauges 1 to the rear end of the high-pressure oil pump shaft and combining them with slip ring 2 to transmit signals, the stress changes of the oil pump shaft can be accurately captured; the signal processing component consisting of strain gauge bridge box 5 and amplifier 6 can effectively convert and amplify signals to ensure data reliability.

[0022] According to the appendix Figure 1 As shown, the signal processing component further includes a strain gauge bridge box 5, an amplifier 6, and a junction box 4; the slip ring 2 is connected to the strain gauge bridge box 5, and the strain gauge bridge box 5 is connected to the data logger 7 through the amplifier 6; the strain gauge bridge box 5 converts the signal of the strain gauge 1 into a bridge signal, the amplifier 6 amplifies the bridge signal and transmits the signal to the data logger 7.

[0023] According to the appendix Figure 1 As shown, it further includes a pressure sensor 8, which is installed on the high-pressure oil circuit and collects pressure signals; and the pressure sensor 8 is connected to the data logger 7 through a signal processing component.

[0024] As shown in the attached diagram, it further includes ECU3, which is connected to the engine and controls the engine speed and load.

[0025] According to the appendix Figure 1 As shown, it further includes a fuel supply assembly, which includes an electronic fuel pump 9 and a fuel tank 11; the fuel tank 11 is connected to the high-pressure fuel pump through the electronic fuel pump 9 to supply fuel to the high-pressure fuel pump.

[0026] According to the appendix Figure 1 As shown, it further includes a power supply component, which includes a DC power supply 12 and an AC220V power supply 13. The DC power supply 12 is connected to the electronic oil pump 9, and the AC220V power supply 13 is connected to the amplifier 6, the data logger 7 and the PC10.

[0027] According to the appendix Figure 1 As shown, furthermore, strain gauge 1 consists of at least two pieces, symmetrically attached to both radial sides of the rear end of the high-pressure oil pump shaft.

[0028] According to the appendix Figure 1 As shown, it further includes an engine speed sensor, which is connected to the engine and collects engine speed signals, and is connected to the data logger 7 through a signal processing component.

[0029] The ECU3 can precisely control the engine speed and load. Combined with the electronic fuel pump 9, fuel tank 11, DC power supply 12 and AC220V power supply 13, it can stably simulate various actual operating conditions. The pressure sensor 8 collects the high-pressure oil circuit pressure, and the engine speed sensor collects the speed signal. These signals are synchronously transmitted to the data logger 7 along with the stress signal from the strain gauge 1, enabling correlation analysis between operating conditions and stress parameters.

[0030] At least two strain gauges 1 are symmetrically attached to the rear end of the high-pressure oil pump shaft. The strain gauge bridge box 5 is connected through the slip ring 2, and the amplifier 6, junction box 4, data recorder 7 and PC10 are connected in sequence. At the same time, the pressure sensor 8 is connected to the high-pressure oil circuit, the engine speed sensor is connected to the engine, and the ECU 3, electronic fuel pump 9, fuel tank 11 and power supply components are connected in a preset manner.

[0031] The target speed and load of the engine are set by ECU3, the electronic fuel pump 9 draws fuel from the fuel tank 11 to supply the high-pressure fuel pump, and the power supply component provides stable power to each device, simulating various operating conditions in actual operation by the user.

[0032] Strain gauge 1 converts the stress change of the oil pump shaft into an electrical signal, which is transmitted to strain gauge bridge box 5 via slip ring 2 and converted into a bridge signal. The signal is then amplified by amplifier 6 and transmitted to data recorder 7. At the same time, the rail pressure signal from pressure sensor 8 and the speed signal from engine speed sensor are synchronously transmitted to data recorder 7 via signal processing component.

[0033] Data logger 7 records all acquired signals and transmits them to PC10; PC10 processes the data to generate results such as stress trend diagram of oil pump shaft, and filters out the speed range corresponding to the peak drive torque, providing a basis for reliability assessment and rapid verification of high-pressure oil pump.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A reliability testing device for an automotive high-pressure oil pump, comprising a strain gauge (1), a slip ring (2), a data logger (7), and a PC (10), characterized in that, The strain gauge (1) is attached to the rear end of the high-pressure oil pump shaft to measure the stress of the oil pump shaft. The slip ring (2) is connected to the strain gauge (1) to transmit the electrical signal of the strain gauge (1). The slip ring (2) is connected to a signal processing component and is connected to a data logger (7) through the signal processing component. The data logger (7) is connected to a PC (10). The data logger (7) is used to record signals, and the PC (10) is used to process the recorded data.

2. The automotive high-pressure oil pump reliability testing device according to claim 1, characterized in that, The signal processing component includes a strain gauge bridge box (5), an amplifier (6), and a junction box (4); the slip ring (2) is connected to the strain gauge bridge box (5), and the strain gauge bridge box (5) is connected to the data logger (7) through the amplifier (6); the strain gauge bridge box (5) converts the signal of the strain gauge (1) into a bridge signal, and the amplifier (6) amplifies the bridge signal and transmits the signal to the data logger (7).

3. The automotive high-pressure oil pump reliability testing device according to claim 1, characterized in that, It also includes a pressure sensor (8), which is installed on the high-pressure oil line and collects pressure signals; and the pressure sensor (8) is connected to the data logger (7) through a signal processing component.

4. The automotive high-pressure oil pump reliability testing device according to claim 1, characterized in that, It also includes an ECU (3), which is connected to the engine and controls the engine speed and load.

5. The automotive high-pressure oil pump reliability testing device according to claim 1, characterized in that, It also includes a fuel supply assembly, which includes an electronic fuel pump (9) and a fuel tank (11); the fuel tank (11) is connected to the high-pressure fuel pump via the electronic fuel pump (9) to supply fuel to the high-pressure fuel pump.

6. The automotive high-pressure oil pump reliability testing device according to claim 1, characterized in that, It also includes a power supply component, which includes a DC power supply (12) and an AC220V power supply (13). The DC power supply (12) is connected to the electronic oil pump (9), and the AC220V power supply (13) is connected to the amplifier (6), the data logger (7), and the PC (10).

7. The automotive high-pressure oil pump reliability testing device according to claim 1, characterized in that, The strain gauge (1) consists of at least two pieces, which are symmetrically attached to the radial sides of the rear end of the high-pressure oil pump shaft.

8. The automotive high-pressure oil pump reliability testing device according to claim 1, characterized in that, It also includes an engine speed sensor, which is connected to the engine and collects engine speed signals, and is connected to a data logger (7) via a signal processing component.

Images