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.

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.

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.

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 Establishment of a Real-Time Simulation of a Marine High-Pressure Common Rail System

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5481
Author(s):  
Qinpeng Wang ◽  
Heming Yao ◽  
Yonghua Yu ◽  
Jianguo Yang ◽  
Yuhai He
Keyword(s):  
High Pressure ◽  
Real Time ◽  
Common Rail ◽  
Rail Pressure ◽  
Common Rail System ◽  
Real Time Simulation ◽  
The Real ◽  
Rail System ◽  
Time Simulation ◽  
High Pressure Common Rail

In this paper, the high-pressure common rail system of the marine diesel engine is taken as case study to establish a real-time simulation model of the high-pressure common rail system that can be used as the controlled object of the control system. On the premise of ensuring accuracy, the real-time simulation should also respond quickly to instructions issued by the control system. The development of the real-time simulation is based on the modular modeling method, and the high-pressure common rail system is divided into submodels, including the high-pressure oil pump, common rail tube, injector, and mass conversion. The submodels are built using the “surrogate model” method, which is mainly composed of MAP data and empirical formulas. The data used to establish the real-time simulation are not only from the empirical research into the high-pressure common rail system, but also from simulations of the high-pressure common rail system undertaken in AEMSim. The data obtained from this real-time simulation were compared with the experimental data to verify the model. The error in fuel injection quality is less than 5%, under different pressures and injection durations. In order to carry out dynamic verification, the PID control strategy, the model-based control strategy, and the established real-time simulation are all closed-loop tested. The results show that the developed real-time simulation can simulate the rail pressure wave caused by cyclic injection according to the control signal, and can feedback the control effect of different control strategies. Through verification, it is clear that the real-time simulation of the high-pressure common rail system can depict the rail pressure fluctuation caused by each cycle of fuel injection, while ensuring the accuracy and responsiveness of the simulation, which provides the ideal conditions for the study of a rail pressure control strategy.

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

DIAGNOSIS OF INJECTORS THROUGH COMMON RAIL PRESSURE MEASUREMENT

2011 ◽  
Vol 159 (1) ◽  
pp. 110-122
Author(s):  
Mirosław KARCZEWSKI ◽  
Krzysztof KOLIŃSKI
Keyword(s):  
Pressure Sensor ◽  
Pressure Measurement ◽  
Common Rail ◽  
Diagnostic Methods ◽  
Fuel System ◽  
Rail Pressure ◽  
Dynamic Changes ◽  
Common Rail Pressure ◽  
The Common ◽  
Pressure Changes

More and more compress engines contain common rail fuel systems. This type of fuel systems injectors are supplied with high pressurised petroleum from the common rail. Dynamic changes of pressure in rail are caused by injection events and fuel supply. The pressure sensor mounted by manufactures in the common rail enables observing and measuring changes in pressure. Pressure changes depend on the phenomena occurring during injection and pumping processes. Every change in each process influences pressure changes in the common rail. The aim of the paper is to elaborate on diagnostic methods of the C-R fuel system based on dynamic changes of pressure in the rail.

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