scholarly journals An Experimental Approach and A Signal Processing Method with the Common Rail Injection System of a Diesel Engine

2021 ◽  
Vol 17 (14) ◽  
pp. 19-31
Author(s):  
Thin Quynh Nguyen ◽  
Andrey Y. Dunin ◽  
Mikhail G. Shatrov
Keyword(s):  
Fuel Injection ◽  
Leading Edge ◽  
Pressure Oscillation ◽  
Injection System ◽  
Flow Mode ◽  
Common Rail Injection System ◽  
Injection Process ◽  
Fuel Flow ◽  
Common Rail Injection ◽  
Different Diameters

This paper presents a method and results, which studies influences of the fuel flow mode on the pressure oscillation in the volumes of the accumulator fuel system. The fuel is supplied through nozzle holes into a constant volume chamber, which is installed a jet for fuel discharge into the low-pressure line. Results show that the increase in the base pressure value of the fuel accumulator leads to the rise in the slope of the leading edge of the differential characteristics and the maximum dQ/dt value changes closer to the beginning moment of the fuel injection process. At the same time, the control pressure value is a significant parameter that greatly influences the shape of the injection characteristic. In addition, when using the drain orifices with different diameters, received values and differential characteristics vary during the fuel supply process. The differential characteristics of the study are the basis for implementing fuel injection control solutions.

scholarly journals Influence of the Fuel Properties on the Injection Process and Spray Development in a large ship diesel Engine

2017 ◽  
Author(s):  
Ibrahim Najar ◽  
Bert Buchholz ◽  
Benjamin Stengel ◽  
Christian Fink ◽  
Egon Hassel
Keyword(s):  
Diesel Engine ◽  
Cone Angle ◽  
Fuel Properties ◽  
Fuel Oil ◽  
Injection System ◽  
Heavy Fuel Oil ◽  
Common Rail Injection System ◽  
Injection Process ◽  
Medium Speed ◽  
Common Rail Injection

The present paper deals with the influence of fuel properties on the spray behaviour. This influence was studiedexperimentally using a common rail injection system from a medium speed diesel engine. The experiments have been performed with diesel fuel (EN-590) and heavy fuel oil (RMG 180) on a constant volume chamber at room temperature. Comparison of the spray characteristics shows that the heavy fuel oil penetrates deeper in the chamber. However, the diesel spray has a bigger cone angle. These results formed the basis for a further development of the 1D-model [1] to predict the spray penetration by considering the fuel properties and temperature.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4787

Power Oriented Modeling of a Common Rail Injector

2002 ◽  
Author(s):  
Riccardo Morselli ◽  
Enrico Corti ◽  
Giorgio Rizzoni
Keyword(s):  
Fuel Injection ◽  
Control Strategies ◽  
Common Rail ◽  
Injection System ◽  
Power Performance ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
Common Rail Injector ◽  
Injection Control ◽  
Advanced Fuel

The common rail injection system has allowed torque and power performance of diesel engines to improve greatly, while reducing fuel consumption and conforming to emissions standards. This paper proposes a simple but effective energy-based model of a common rail injector as a basis for the implementation of the advanced fuel injection control strategies. The proposed model has been validated comparing the simulation results with real experimental data. The obtained results show how the dynamic behavior of the injector is well captured by the model.

scholarly journals Selection of alternative material for common rail direct injection system

2014 ◽  
Vol 3 (2) ◽  
pp. 230
Author(s):  
N. Senguttuvan ◽  
S Raja ◽  
R. Sasidharan
Keyword(s):  
Fuel Injection ◽  
Direct Injection ◽  
Common Rail ◽  
Injection System ◽  
Common Rail System ◽  
Common Rail Injection System ◽  
Alternative Material ◽  
Common Rail Injection ◽  
Direct Fuel Injection ◽  
System Prototype

Common rail direct fuel injection is a modern variant of direct fuel injection system for petrol and diesel engines. The common rail system prototype was developed in the late 1960s by Robert Huber of Switzerland and the technology further developed by Dr. Marco. In petrol engine MPFI technology was developed and implemented in earlier days. Basically common rail tube was fabricated by steel for petrol engines. In the current study Steel, Brass, Aluminum alloy a356 and ABS materials were analyzed separately and aluminum is found the best material among the steel, brass and ABS material for common rail injection tube. Keywords: Common Rail Injection System, Alternate Material.

Experimental study of the two-stage injection process of fatty acid esters on a common rail injection system

Fuel ◽  
2016 ◽  
Vol 163 ◽  
pp. 214-222 ◽  
Author(s):  
Dong Han ◽  
Yaozong Duan ◽  
Chunhai Wang ◽  
He Lin ◽  
Zhen Huang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fatty Acid ◽  
Common Rail ◽  
Fatty Acid Esters ◽  
Injection System ◽  
Two Stage ◽  
Common Rail Injection System ◽  
Injection Process ◽  
Common Rail Injection ◽  
Acid Esters

Investigation of the Cavitation in High Pressure Diesel Injection Nozzles

2002 ◽  
Author(s):  
Ihab Baz ◽  
Jean-Claude Champoussin ◽  
Michel Lance ◽  
Jean-Louis Marie´
Keyword(s):  
Test Bench ◽  
Laser Light ◽  
Light Sheet ◽  
Cavitation Number ◽  
Injection System ◽  
Common Rail Injection System ◽  
Injection Process ◽  
Diesel Injection ◽  
Direct Measurements ◽  
Common Rail Injection

Laser light sheet and shadowgraphy techniques have been applied to investigate cavitation phenomena in the spray hole of Diesel injection nozzles. The nozzles were operated on a test-bench based on a Common Rail injection system. Rail pressures up to 50 MPa were used. The diesel test oil was injected into a chamber which could be pressurized up to 8 MPa. The local position and range of cavitation films, lying between the flow and the nozzle wall, as well as single bubbles could be observed at different instants of the injection process. The pictures of the light sheet experiment were compared with photographs taken by the shadowgraphy technique under the same injection conditions. Cavitation number estimates were obtained by direct measurements of nozzle sac pressures.

scholarly journals Effect of the In-Cylinder Back Pressure on the Injection Process and Fuel Flow Characteristics in a Common-Rail Diesel Injector Using GTL Fuel

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 452
Author(s):  
Luka Lešnik ◽  
Breda Kegl ◽  
Eloísa Torres-Jiménez ◽  
Fernando Cruz-Peragón ◽  
Carmen Mata ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Back Pressure ◽  
Common Rail ◽  
Fuel Properties ◽  
Injection System ◽  
Nozzle Flow ◽  
Average Mass ◽  
Injection Process ◽  
Fuel Flow ◽  
Computational Program

The presented paper aims to study the influence of mineral diesel fuel and synthetic Gas-To-Liquid fuel (GTL) on the injection process, fuel flow conditions, and cavitation formation in a modern common-rail injector. First, the influence on injection characteristics was studied experimentally using an injection system test bench, and numerically using the one-dimensional computational program. Afterward, the influence of fuel properties on internal fuel flow was studied numerically using a computational program. The flow inside the injector was considered as multiphase flow and was calculated through unsteady Computational Fluid Dynamics simulations using a Eulerian–Eulerian two-fluid approach. Finally, the influence of in-cylinder back pressure on the internal nozzle flow was studied at three distinctive back pressures. The obtained numerical results for injection characteristics show good agreement with the experimental ones. The results of 3D simulations indicate that differences in fuel properties influence internal fuel flow and cavitation inception. The location of cavitation formation is the same for both fuels. The cavitation formation is triggered regardless of fuel properties. The size of the cavitation area is influenced by fuel properties and also from in-cylinder back pressure. Higher values of back pressure induce smaller areas of cavitation and vice versa. Comparing the conditions at injection hole exit, diesel fuel proved slightly higher average mass flow rate and velocities, which can be attributed to differences in fluid densities and viscosities. Overall, the obtained results indicate that when considering the injection process and internal nozzle flow, GTL fuel can be used in common-rail injection systems with solenoid injectors.

Sign in / Sign up

Export Citation Format

Share Document