Numerical Simulations by Detailed Chemistry and Experimental Measurements of Diesel Combustion in a Light Duty Common Rail Direct Injection Engine

2005 ◽  
Author(s):  
Michela Costa ◽  
Bianca M. Vaglieco ◽  
Felice E. Corcione ◽  
Hiroshi Omote
Keyword(s):  
Diesel Fuel ◽  
Digital Images ◽  
Direct Injection ◽  
Computational Cost ◽  
Diesel Oil ◽  
Common Rail ◽  
Injection System ◽  
Numerical Code ◽  
Detailed Chemistry ◽  
Common Rail Injection System

Present paper couples the use of a modified version of the KIVA-3V code including a model for detailed chemistry to an experimental investigation performed on an optically accessible diesel engine. The engine is equipped with a commercial four valves cylinder head and a Common Rail injection system. Digital images and UV-visible flame emission measurements are compared with the visualization of the numerical results. The diesel fuel surrogate is considered within the numerical code, namely a blend consisting of n-heptane and toluene, approximating the physical and ignition properties of the diesel oil. Products, soot and NOx formation is described by a chain of 283 reactions involving 69 species. The Partially Stirred Reactor (PaSR) assumption is adopted to maintain the computational cost within acceptable limits. The collections of digital images of the spray evolution, the mixture formation and the combustion processes are undertaken by running the engine at 1000 rpm. Commercial diesel fuel is injected by using a single injection.

Ion Current, Combustion and Emission Characteristics in an Automotive Common Rail Diesel Engine

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Naeim A. Henein ◽  
Tamer Badawy ◽  
Nilesh Rai ◽  
Walter Bryzik
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Direct Injection ◽  
Common Rail ◽  
Ion Current ◽  
Injection System ◽  
Feedback Signal ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
No Emissions

Advanced electronically controlled diesel engines require a feedback signal to the ECU to adjust different operating parameters and meet demands for power, better fuel economy and low emissions. Different types of in-cylinder combustion sensors are being considered to produce this signal. This paper presents results of an experimental investigation on the characteristics of the ion current in an automotive diesel engine equipped with a common rail injection system. The engine is a 1.9 L, 4-cylinder, direct injection diesel engine. Experiments covered different engine loads and injection pressures. The relationships between the ion current, combustion parameters and engine out NO emissions and opacity are presented. The analysis of the experimental data identified possible sources of the ion current produced in diesel engines.

Response Surface Method Optimization of a High-Speed Direct-Injection Diesel Engine Equipped With a Common Rail Injection System

2003 ◽  
Vol 125 (2) ◽  
pp. 541-546 ◽  
Author(s):  
T. Lee ◽  
R. D. Reitz
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Direct Injection ◽  
Fuel Efficiency ◽  
Common Rail ◽  
Injection System ◽  
Particulate Emissions ◽  
Common Rail Injection System ◽  
Rsm Optimization ◽  
Common Rail Injection

To overcome the tradeoff between NOx and particulate emissions for future diesel vehicles and engines it is necessary to seek methods to lower pollutant emissions. The desired simultaneous improvement in fuel efficiency for future DI diesels is also a difficult challenge due to the combustion modifications that will be required to meet the exhaust emission mandates. This study demonstrates the emission reduction capability of EGR and other parameters on a high-speed direct-injection (HSDI) diesel engine equipped with a common rail injection system using an RSM optimization method. Engine testing was done at 1757 rev/min, 45% load. The variables used in the optimization process included injection pressure, boost pressure, injection timing, and EGR rate. RSM optimization led engine operating parameters to reach a low-temperature and premixed combustion regime called the MK combustion region, and resulted in simultaneous reductions in NOx and particulate emissions without sacrificing fuel efficiency. It was shown that RSM optimization is an effective and powerful tool for realizing the full advantages of the combined effects of combustion control techniques by optimizing their parameters. It was also shown that through a close observation of optimization processes, a more thorough understanding of HSDI diesel combustion can be provided.

Development and Application of a Complete Common-Rail Injection System Mathematical Model for Hydrodynamic Analysis and Diagnostics

2005 ◽  
Author(s):  
Andrea Emilio Catania ◽  
Alessandro Ferrari ◽  
Michele Manno
Keyword(s):  
Mathematical Model ◽  
Wave Propagation ◽  
Flow Rate ◽  
Performance Optimization ◽  
Common Rail ◽  
Injection System ◽  
Numerical Code ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
Time Histories

A rather complete mathematical model for a Common Rail injection-system dynamics numerical simulation was developed to support experimentation, layout and control design, as well as performance optimization. The thermo-fluid dynamics of the hydraulic system components, including rail, connecting pipes and injectors was modeled in conjunction with the solenoid-circuit electromagnetics and the mechanics of mobile elements. Onedimensional flow equations in conservation form were used to simulate wave propagation phenomena throughout the high-pressure connecting pipes, including the feeding pipe of the injector nozzle. In order to simulate the temperature variations due to the fuel compressibility, the energy equation was used in addition to mass conservation and momentum balance equations. Besides, the possible cavitation phenomena effects on the mass flow rate through the injector bleed orifice and the nozzle holes were taken into account. A simple model of the electromagnetic driving circuit was used to predict the temporal distribution of the force acting on the pilot-valve anchor. It was based on the experimental time-histories of the current through the solenoid and of the associated voltage that is provided by the electronic control unit (ECU) to the solenoid valve. The numerical code was validated through the comparison of the prediction results with experimental data, that is, pressure, injected flow rate and needle lift time-histories, taken on a high performance test bench Moehwald-Bosch MEP2000-CA4000. The novel injection-system mathematical model was applied to the analysis of transient flows through the hydraulic circuit of a commercial multijet second-generation Common Rail system, paying specific attention to the wave propagation phenomena, to their dependence on solenoid energizing time and rail pressure, as well as to their effects on system performance. An insight was also given into the model capability of accurately predicting the wave dynamics effects on the rate and mass of fuel injected when the dwell time between two consecutive injections is varied.

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.

scholarly journals Research on the quality of diesel fuel provided by LLC Ferronordic Trading House

2019 ◽  
Vol 81 (3) ◽  
pp. 208-212
Author(s):  
E. L. Iovleva
Keyword(s):  
Diesel Fuel ◽  
Mass Fraction ◽  
Research Work ◽  
Poor Quality ◽  
Common Rail ◽  
Spray Angle ◽  
Injection System ◽  
Construction Equipment ◽  
Common Rail Injection System

Ferronordic is the official dealer for Volvo Construction Equipment, Dressta, Mecalac and Rottne. In addition to sales and after-sales support for Volvo Construction Equipment, the company is a dealer for servicing Volvo and Renault Trucks, as well as a dealer for Volvo Penta for servicing industrial and marine engines in some regions of Russia. The company collaborates with other well-known brands and several suppliers of attachments. The Swedish concern Volvo Group supplies to the Russian market trucks equipped with diesel engines with Common Rail injection system, as well as with pump nozzles. Diesel mechanical and electronic pump nozzles perform timely and metered injection of the working mixture into the combustion chambers of the cylinders of a diesel engine. The mechanical nozzles are driven by a high-pressure fuel pump, while the electronic ones are controlled by the Common Rail electronic injection system and are constantly under intense mechanical stress. Poor quality diesel fuel leads to: loss of power, lack of traction and instability of the engine; overexpenditure and fuel leakage from sprayers; change in spray angle and time; change in the amount of injected mixture; the appearance of knocks and noises, black and bluish smoke during exhaust. The results of research work on the study of the quality of diesel fuel of the company LLC Ferronordic Trading House are presented. The physicochemical properties of diesel fuel were studied experimentally, such as: density, fractional composition, mass fraction of sulfur, mass fraction of water, flash point, limiting filterability temperature and cloud point.

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