The invention relates to diesel fuel atomization testing devices, in particular to a diesel fuel atomization characteristic testing device for a high-pressure common rail system. The diesel fuel atomization characteristic testing system comprises a diesel fuel tank, an electric fuel pump, a high-pressure oil pump, a common rail fuel pipe, an electronic control unit, a fuel atomizer, a high-pressure gas chamber, a nitrogen container and a computer. The diesel fuel atomization characteristic testing device has the advantages that the testing device can be used for simulating diesel fuel atomization characteristic testing of a single-hole fuel atomizer or a multi-hole fuel atomizer, atomization penetration distance and atomization cone angle can be measured simultaneously, and atomization shapes of the multi-hole fuel atomizer can be measured; total fuel atomization quality of rated fuel atomization can be measured, and fuel atomization quantity change under different atomization pressure and different back pressure (pressure of the high-pressure gas chamber) can be conveniently compared; automation characteristics under the change state of the back pressure and the atomization pressure can be tested.

Diesel fuel atomization characteristic testing device for high-pressure common rail system

An evaluating method and measuring device for the uniformity of spray holes of an oil sprayer involve the evaluating method for the uniformity of the spray holes of the oil sprayer ("evaluating method" for short) and the measuring device for the uniformity of the spray holes of the oil sprayer ("measuring device" for short). An inlet air heating and pressurizing system and an exhaust air cooling system are connected to two side faces of a high temperature and high pressure device body of the measuring device correspondingly, a computer is connected with a synchronous control system which controls an oil supply system and a high speed camera, a 45-degree plane reflective mirror is located under the high temperature and high pressure device body, and the center of the 45-degree plane reflective mirror and the central axis of the high speed camera are located in the same horizontal plane. The evaluating method includes the steps of initializing the measuring device and the synchronous control system, setting various parameters, triggering the high speed camera and the oil sprayer, obtaining and processing images, and then obtaining test data of working consistency and durability of the spray holes. The evaluating method and measuring device for the uniformity of the spray holes of the oil sprayer can accurately simulate practical work of an engine, obtain accurate measurement data and are high in applicability.

Evaluating method and measuring device for uniformity of spray holes of oil sprayer

The invention discloses a zero-oil quantity correcting method of a high-pressure common rail oil sprayer; such various zero-oil quantity correcting control parameters as demanded oil rail pressure, starting spraying pulse width and working condition limit value are only required to be set beforehand; and in later operations of a vehicle and an engine, the zero oil quantity of the high-pressure common rail oil sprayer is automatically corrected at a proper time, so that the tedious operation of repeated calibration on an oil pump test bench is prevented, and the correcting cost is low; the method uses a torque estimating mode, and is more accordant with an engine torque structure control thought compared with a traditional rotating speed or acceleration estimating mode, so that the zero-oil quantity correcting control precision is improved; the data of various zero-oil quantity correcting control parameters is from the calibration of the performances of the engine and the vehicle in the calibration phase; and the calibration data can improve the correcting precision and the robustness. The invention further discloses a zero-oil quantity self-correcting control module.

Zero-oil quantity correcting method of high-pressure common rail oil sprayer and zero-oil quantity self-correcting control module

The invention discloses an oil-gas separation and detection device for return oil of a common-rail oil injector The oil-gas separation and detection device comprises an oil pumping assembly, the oil injector, a liquid-gas detection assembly and a heat preservation assembly Fuel oil is pressurized and supplied to the oil injector through the oil pumping assembly An oil return pipe of the oil injector is connected with the liquid-gas detection assembly which is arranged in the heat preservation assembly Compared with the prior art, the oil-gas separation and detection device has the beneficial effects that through a liquid-gas separation device, gas and liquid in the return oil can be separated, the flowing speeds of fluids of the two phases of gas and liquid at a constant temperature are obtained, the two phases of the gas and the liquid are independently measured, the static oil return quantity and the dynamic oil return quantity are distinguished, and a detection result is matched with a one-time injection instrument so that an evaluation system for oil injector oil injection, oil return and gas in the return oil can be built

Oil-gas separation and detection device for return oil of common-rail oil injector

The invention provides performance test method and system for a high pressure oil pump. The test system comprises an oil tank, a heating rod, an oil injecting pipe, an oil returning pipe, the high pressure oil pump, a metering valve, a fuel temperature sensor, a high pressure oil pipe, a common rail pipe, a fuel pressure sensor, an oil injector and an electronic control unit; the test method comprises the following steps: under the condition of guaranteeing temperature constancy of fuel, adjusting the rotate speed of the oil pump and the duty ratio of a PWM wave of a control signal of the metering valve by virtue of an upper computer control interface to obtain a rail pressure-duty ratio relationship curve chart and a rail pressure-rotate speed relation curve chart of the to-be-tested pump; being compared with a standard pump to judge whether the error is in a permitted error range or not. The method and system provided by the invention have the advantages that the fuel temperature in the whole process is maintained constant, so that the influence on the oil pumping efficiency by the high pressure oil pump as the environmental temperature is changed is avoided; an oil injecting metering valve is adopted in the test system, so that the oil injecting amount of the high pressure oil pump is accurately controlled; in the test method, no pressure reducing valves and flowmeters are used and no pressure limiting valves are installed.

Performance test method and system for high pressure oil pump

The invention provides a detection and analysis test stand of an electric control diesel engine injector, comprising a test stand casing, an oil supply system, a control system and a detection and display system, wherein the control system comprises a power supply, a transformer, a PLC (Programmable Logic Controller) and a display screen control console which are sequentially connected; the PLC is respectively connected with an injector to be detected, a high-pressure oil pump of the oil supply system, various sensors, a spraying detector in the detection and display system and various solenoid valves in the detection and display system for oil delivery control; the transformer is respectively connected with the injector, the spraying detector in the detection and display system and an oil delivery pump in the oil supply system; the injector is fixed in the detection and display system; and the power supply is connected with the oil supply system which is connected with the detection and display system. The invention also provides a control method of the test stand, which is used for detecting various performances of the injector by the control of the PLC. The invention has the advantages of complete functions, high detection efficiency and the like and is applicable for tests of various automobile servicing stations, universities and colleges and research institutions.

Detection and analysis test stand of electric control diesel engine injector and control method thereof

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Xingwang Cai

Author Tools

Chat about Author

Papers

Detection and analysis test stand of electric control diesel engine injector and control method thereof