JUSTIFYING THE FUEL SUPPLY IN THE COMMON RAIL SYSTEM WHEN DIAGNOSING THE VEHICLE ENGINE

2021 ◽  
Vol 2 (143) ◽  
pp. 12-20
Author(s):  
Dmitriy A. Galin ◽  
◽  
Nikolay V. Rakov ◽  
Aleksandr M. Davydkin ◽  
Leonid O. Krush
Keyword(s):  
Fuel Injection ◽  
Control Unit ◽  
Technical Condition ◽  
Common Rail ◽  
Research Purpose ◽  
Training Procedure ◽  
Common Rail System ◽  
Fuel Supply ◽  
Rail System ◽  
The Common

Analysis of technical condition of diesels with accumulator Common Rail power supply system shows that the largest share of fuel equipment failures is associated with malfunction of high-pressure fuel injectors. The electronic engine control unit generates commands for biphasic fuel injection from each injector. Due to the wear of the injector elements, there is an uneven fuel supply to the engine cylinders and, as a rule, deterioration of its operation. (Research purpose) The research purpose is in studying the process of adjusting the fuel supply in the Common Rail system when diagnosing the engine of a Ford Transit vehicle. (Materials and methods) The most relevant method of commissioning Common Rail fuel system injectors are various service procedures, such as the Low Injection Training procedure. Authors used a scanner and appropriate software to estimate total fuel delivery at idle mode. Authors performed the study on a 2.4 liter Duratorq diesel engine. (Results and discussion) The article presents the engine parameters before and after adjustment (Small Injection Procedure). Before adjustment, two cylinders of the engine received more fuel than the other cylinders. It manifests in an increase in crankshaft speed. After the adjustment, the fuel supply to the cylinders was equalized, resulting in an equalization of crankshaft RPM, reduced vibration and noise. (Conclusions) The study showed that fuel adjustment and Low Injection Training should be a must for engine diagnostics. Correction is effective if the value of injection discrepancy is no more than 5 mg/stroke.

Visualization of the Parameters and Changes of Signals Controlling the Operation of Common Rail Injectors

2013 ◽  
Vol 210 ◽  
pp. 136-141 ◽  
Author(s):  
Sławomir Wierzbicki ◽  
Michał Śmieja
Keyword(s):  
Fuel Injection ◽  
Common Rail ◽  
Control Signal ◽  
Electric Signal ◽  
Common Rail System ◽  
Output Stage ◽  
Rail System ◽  
Electrical Part ◽  
The Common ◽  
Proper Operation

The electromagnetic injector in the Common Rail system is the actuator directly responsible for fuel injection. Its proper operation is enabled by ensuring appropriately shaped changes of the electric signal worked out by the output stage of the controller. This paper determines the repeatability of the control signal and the possibility of using this signal for the diagnostics of the electrical part of the injector.

scholarly journals FORECAST EVALUATION OF POSSIBLE VALUES OF FUEL INJECTION PRESSURE OF COMMON RAIL SYSTEM

2020 ◽  
Vol 15 (2) ◽  
pp. 92-95
Author(s):  
Vladimir Ivanov ◽  
Aleksandr Semenov ◽  
Vladislav Gavrilov ◽  
Aleksey Novikov ◽  
M. Volhonov
Keyword(s):  
Power System ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Operating Conditions ◽  
Common Rail ◽  
Analytical Dependence ◽  
Common Rail System ◽  
Rail System ◽  
The Common ◽  
Fuel Injection Pressure

In engineering practice, forecasting is considered to be the most effective methods for assessing reliability indicators and determining expected technical and economic indicators, taking into account the technical level of improving the diesel power system. The solution of such problems requires a description of changes in the parameters of objects at different points in time. The purpose of the research is to predict the possible values of the fuel injection pressure of the Common Rail system for the near future for the timely creation of operating conditions, maintenance and repair measures. A statistical method was used to predict changes in the fuel injection pressure in the diesel power system. The forecasting technique included the stages of analyzing the initial information, choosing the analytical dependence of the change in the considered parameter in the past, extrapolating the resulting dependence for the forecast period and evaluating the results. The choice of analytical dependences of changes in the estimated pressure value was carried out by the method of least squares. The degree of connection between the considered analytical dependence and the line constructed from the initial data was determined by the value of the correlation coefficient. As the technical, economic and environmental requirements become more stringent, the requirements for the power supply system of internal combustion engines are growing, which necessitates an increase in the functionality of the fuel equipment, primarily in terms of the value of the fuel injection pressure. The paper considers the results of a predictive assessment of possible values of injection pressure of the Common Rail fuel system. The results of the study make it possible to predict an increase in the fuel injection pressure of the Common Rail system by 2026 up to 300 MPa. To ensure high indicators of technical readiness of the enterprises of technical service of diesel fuel equipment, it is necessary to take into account possible changes in the values of the fuel injection pressure in the future

scholarly journals Oscillation damping in the power unit when starting the engine equipped with the Common Rail system

2018 ◽  
Vol 224 ◽  
pp. 02037 ◽  
Author(s):  
Igor Taratorkin ◽  
Victor Derzhanskii ◽  
Alexander Taratorkin
Keyword(s):  
Mechanical System ◽  
Power Unit ◽  
Dynamic Loading ◽  
Simulation Modeling ◽  
Common Rail ◽  
Common Rail System ◽  
Power Train ◽  
Rail System ◽  
The Common ◽  
Oscillation Damping

The paper studies formation of the power-train elements dynamic loading at engine starting, shows the results of experiments and of simulation modeling and substantiates the ways of reducing dynamic loading of the mechanical system under study.

scholarly journals The effect of multi-phase injection on selected parameters of the common rail fuel system

2008 ◽  
Vol 135 (4) ◽  
pp. 22-28
Author(s):  
Krzysztof BALAWENDER ◽  
Hubert KUSZEWSKI ◽  
Kazimierz LEJDA ◽  
Adam USTRZYCKI
Keyword(s):  
Common Rail ◽  
Dose Measurement ◽  
Rail Pressure ◽  
Fuel Temperature ◽  
Common Rail System ◽  
Visualization System ◽  
Fuel Supply ◽  
The Common ◽  
Multi Phase ◽  
Supply Systems

The common rail fuel supply systems due to their flexibility of injection characteristics are the most frequently applied fuel supply solution in Diesel engines. The most essential parameters, which have the effect on the phenomena taking place in a Common Rail system are the duration of the injection, rail pressure and fuel temperature. There may also be other factors effecting the course of the injection. The split of the fuel dose into a few parts can cause a pressure fluctuation in the rail and also in the whole system, effecting the course of the injection. In the article tests results related with the influence of multiple injection on the total fuel dose and real onset of the injection have been presented. The tests were carried out on a test stand fitted with Bosch EPS-815 (electronic fuel dose measurement). For the testing of the real injection onset the visualization system AVL Visioscope was used. The control of the injector was realized through a controller which enabled to split the fuel dose into three parts.

scholarly journals A Study on the Injection Characteristics of Swirl Nozzle Injector in Common-rail System for High Pressure Fuel Injection

2013 ◽  
Vol 21 (4) ◽  
pp. 89-95
Author(s):  
Yunsub Sin ◽  
Geesoo Lee ◽  
Hyunchul Kim ◽  
Sangshin Kwak ◽  
Suk Shin Shin ◽  
...  
Keyword(s):  
High Pressure ◽  
Fuel Injection ◽  
Common Rail ◽  
Common Rail System ◽  
Rail System

Improvement of the Robustness of the Common Rail System for the Fuel Diversification

2015 ◽  
Author(s):  
Takahito Niwa ◽  
Takashi Eguchi ◽  
Koichi Yamada ◽  
Satoshi Bunne ◽  
Toshihiko Omori ◽  
...  
Keyword(s):  
Common Rail ◽  
Common Rail System ◽  
Rail System ◽  
The Common

Optimized Design of Structure Parameter of New Fuel Injection System

2013 ◽  
Vol 655-657 ◽  
pp. 486-490 ◽  
Author(s):  
Zi Lai Luo ◽  
Kang Huang
Keyword(s):  
Pressure Loss ◽  
Fuel Injection ◽  
Common Rail ◽  
Injection System ◽  
Optimized Design ◽  
Common Rail System ◽  
System Pressure ◽  
Rail Systems ◽  
Marine Diesel ◽  
The Common

According to the characteristics and the future tendency of common rail systems for marine diesel engines，the paper used a new injector. A simulation model of the common rail system with new injector was established using HYDSIM system, pressure fluctuation of the common rail pipe and pressure loss of the injector as evaluation indicator, the injector was simulated and optimized using DOE method. Simulation results show that appropriate selection of the structure parameters of the injector structure can effectively prevent the injectors from interfering each other and degree pressure loss of injector.

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