Application of Common Rail Fuel Injection System to a Heavy Duty Diesel Engine

Yamaki, Yoshihisa; Mori, Koji; Kamikubo, Hiroshi; Kohketsu, Susumu; Mori, Kohji; Kato, Tetsuro

doi:10.4271/942294

Cited by 22 publications

(10 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shundhoh.et al [3] reported that NO X could be reduced by 35%, and smoke by 60 to 80 %, without a penalty in fuel economy if pilot injection was used in conjunction with high pressure injection. Yamaki.et al [4] investigated the effects of pilot injection on exhaust emissions in a turbocharged heavy duty Diesel engine and found that with partial load, when the pilot fuel quantity was increased, Fuel consumption and smoke was increased, but NO X was found to decrease and then increase. Minami et al [5] studied the effects of pilot injection s in a turbocharged DI diesel engine and found that the pilot injection was effective to reduce NO X and HC at low load conditions, through it deteriorated smoke to some degree.…”

Section: Literature Reviewmentioning

confidence: 99%

Mechanism of Emission Reduction in HSDI Diesel Engine: Split Injection

2015

(IJTEE)

View full text Add to dashboard Cite

In order to meet the stringent emission standards significant efforts have been imparted to the research and development of cleaner IC engines. Diesel combustion and the formation of pollutants are directly influenced by spatial and temporal distribution of the fuel injected. The development and validation of computational fluid dynamics (CFD) models for diesel engine combustion and emissions is described. The complexity of diesel combustion requires simulation with many complex interacting sub models in order to have a success in improving the performance and to reduce the emissions. In the present work an attempt has been made to develop a multidimensional axe-symmetric model for CI engine combustion and emissions. Later simulations have been carried out using split injection for single, double and three pulses (split injection) for which commercial validation tool FLUENT was used for simulation. The tool solves basic governing equations of fluid flow that is continuity, momentum, species transport and energy equation. Using finite volume method turbulence was modeled by using RNG K-ɛ model. Injection was modeled using La Grangian approach and reaction was modeled using non premixed combustion which considers the effects of turbulence and detailed chemical mechanism into account to model the reaction rates. The specific heats were approximated using piecewise polynomials. Subsequently the simulated results have been validated with the existing experimental values. The peak pressure obtained by simulation for single and double is 10% higher than to that of experimental value. Whereas for triple injections 5% higher than to that of experimental value. For quadruple injection the pressure has been decreased by 10% when compared to triple injection.NOX have been decreased in simulation for single, double and triple injections by 15%, 28% and 20%.For quadruple injection NOX were reduced in quadruple injection by 20% to that of triple injection. The simulated value of soot for single, double and triple injections are 12%, 22% and 12% lesser than the experimental values. For quadruple injection the soot levels were almost negligible. The simulated heat release rates for single, double and triple were reduced by 12%, 18% and 11%. For quadruple injection heat release is reduced same as to that of triple injection.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Mechanism of Emission Reduction in HSDI Diesel Engine: Split Injection

2015

(IJTEE)

View full text Add to dashboard Cite

show abstract

“…For this purpose the two combustion chambers have been positioned along the piston pin axis. The dual chamber system guarantees also improved reliability due to dual separate common rail systems [6][7].…”

Section: The Hybrid Propulsionmentioning

confidence: 99%

Aircraft Propulsion Systems : A Diesel Hybrid Engine

Francia

Piancastelli

2008

The International Conference on Applied Mechanics and Mechanica

View full text Add to dashboard Cite

Recent developments in diesel piston engine technology have increased performance in a very significant way. In this paper a new hybrid diesel-turbine engine is introduced and it is compared to up-to-date turboprops. The weak point of the common rail engine is the difficulty to obtain very fast injectors for large engines. Automotive injectors are available only for small power outputs. The problem was solved with a dual chambers piston with two injectors per cylinder. It is then possible to use off-the-shelf automotive common rail components even on very large diesel engines with benefits on combustion especially at medium low power level. The other more interesting advantage is a significant increase on crankshaft maximum speed and reduction of head mechanical stress. It is then possible to have smaller and more powerful turbodiesel and hybrid engines. Another advantage is the improved reliability of a dual injection system. The dieselturbine hybrid power unit proposed in this paper combines the advantages of the turboprop/turbofan/turboshaft and piston turbo-dieselprop / turbo-diesel-fan / turbodiesel engines. However, It should be clear than the automotive commercial common rail components should be treated to use jp4, jp8 and jet(A1) fuels and to fulfil aeronautical requirements.

show abstract

“…Consequently, the common-rail fuel injection system (CRS) has been invented and deployed in the past two decades [5][6][7][8]. Not only can the fuel injection pressure and injection timing be controlled independently, but also the flexible fuel injection rate shape can be regulated and fuel multi-injection modes realized by the CRS.…”

Section: Introductionmentioning

confidence: 99%

Study on the combustion and emission characteristics of a diesel engine with multi-injection modes based on experimental investigation and computational fluid dynamics modelling

Shi

Qiao

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

In this paper, experiments were carried out on a direct-injection diesel engine using a common-rail system, in order to study the effects of multi-injection modes on the combustion characteristics and pollutant emissions. A soot model was proposed for the post-injection mode, namely the Hiroyasu—Kodota averaged-reaction-rate soot model, which took into account both the chemical kinetics reaction and the turbulent mixing motion of the spray jet. Through integrating the revised soot model into a computational fluid dynamics (CFD) code, the combustion process and pollutants formation of the tested engine were simulated. The in-cylinder gas pressure and combustion heat release rate showed satisfactory agreement with measurements. The experimental data demonstrated that the pilot-injection mode was one of the most effective measures for reducing combustion noise. Meanwhile an optimum split-injection mode consisting of an appropriate pilot-injection fuel quantity combined with an optimal pilot-injection—main-injection interval could be achieved to decrease the nitrogen oxide (NO x) emission while not causing the particulate matter (PM) emission to deteriorate very much. Two innovative concepts of an active thermo-atmosphere and a passive inert atmosphere were presented from numerical simulation to discuss the effect of the pilot-injection mode on the combustion behaviour of the main injection. Regarding the post-injection mode, its prominent advantage was to decrease significantly the PM emission without an NO x emission penalty. Furthermore, by CFD modelling of the soot formation process, it can be observed that the turbulent mixing motion caused by the post-injection spray played a vital role in the soot oxidization process.

show abstract

Application of Common Rail Fuel Injection System to a Heavy Duty Diesel Engine

Cited by 22 publications

References 6 publications

Mechanism of Emission Reduction in HSDI Diesel Engine: Split Injection

Mechanism of Emission Reduction in HSDI Diesel Engine: Split Injection

Aircraft Propulsion Systems : A Diesel Hybrid Engine

Study on the combustion and emission characteristics of a diesel engine with multi-injection modes based on experimental investigation and computational fluid dynamics modelling

Contact Info

Product

Resources

About