Modeling of pressure line behavior of a common rail diesel engine due to injection and fuel variation

Mohebbi, Mostafa; Aziz, Azhar Abdul; Hamidi, Arman; Hajialimohammadi, Alireza; Hosseini, Vahid

doi:10.1007/s40430-016-0573-z

Cited by 19 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the lowest exergy-to-energy ratio of heat transfer for RCCI is attributed to its lowest boundary layer temperature. 11 At a fixed CA50 for RCCI combustion, the exergy transfer through exhaust are smaller than CDC regimes due to the advanced CA90. Due to shortest combustion duration and the advanced CA90, HCCI reveals the lowest ratio of exergy transfer through exhaust.…”

Section: Description Of Rcci Combustion Numerical Modelmentioning

confidence: 98%

“…diethyl ether (DEE) or diesel, is injected directly but early enough to extend mixing time and limit soot emission formation in locally rich cool zones and NOx formation in locally stoichiometric hot zones. 10,11 The reactive fuel proportion, injection timing, and magnitude of reactivity are significant control parameters to ensure the engine operates optimally over speed ranges, load, and boost temperature. 12,13 Under the combined effect, extended combustion duration and stratified heat release rate (HRR) in the RCCI combustion engine resolve the knock limits.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Availability analysis on combustion of n-heptane and isooctane blends in a reactivity controlled compression ignition engine

Mohebbi

Reyhanian

Ghofrani

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

Self Cite

View full text Add to dashboard Cite

Unfortunately, energy demands and destruction of the environment from uncontrolled manipulation of fossil fuels have increased. Climate change concerns have resulted in the rapid use of new, alternative combustion technologies. In this study, reactivity controlled compression ignition (RCCI) combustion, which can simply be exploited in internal combustion (IC) engines, is investigated. To introduce and identify extra insightful information, an exergy-based study was conducted to classify various irreversibility and loss sources. Multidimensional models were combined with the primary kinetics mechanism to investigate RCCI combustion, incorporating the second law of thermodynamics. The n-heptane, a highly reactive fuel, was supplied by direct injection into the cylinder, whereas premixed fuel was supplied through the intake port in an isooctane/n-heptane RCCI engine. For five n-heptane increments (5%, 7.5%, 15%, 25%, and 40%) and six different exhaust gas recirculation (EGR) rates (0%, 10%, 20%, 30%, 40%, and 50%), accumulation of different exergy terms was calculated. The results show that as EGR introduction increases from 0% to 50%, the exergy destruction increases from 21.1% to 28.9%. Furthermore, the value of exhaust thermomechanical exergy decreases from 18.4% to 14.4% of the mixture fuel chemical exergy. Among the five different high reactive fuel mass regimes, the 40% n-heptane mass fraction has the major heat transfer exergy owing to its advanced CA50 that exerts a unique influence on cylinder charge temperature of heat transfer layer. The utilization efficiency of exhaust in RCCI is less affected by the variation of reactive fuel mass fraction by contrast; it will significantly influence heat transfer availability. This study revealed that with increasing reactive fuel (n-heptane) from 7.5% to 40% the irreversibility decreased from 28.6% to 25.8% and the second law efficiency first increased from 43.2% to 44.6% at 15% n-heptane then decreased to 42.9% at 40% n-heptane.

show abstract

Section: Description Of Rcci Combustion Numerical Modelmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Availability analysis on combustion of n-heptane and isooctane blends in a reactivity controlled compression ignition engine

Mohebbi

Reyhanian

Ghofrani

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

Self Cite

View full text Add to dashboard Cite

show abstract

“…The following assumptions are made for the hydraulic system when establishing the mathematical model: The effects of pressure loss, pipe characteristics, and fluid quality in the pipeline are neglected; the volumetric elastic modulus of the oil is constant; the temperature of the oil remains unchanged; and the leakage inside and outside the hydraulic cylinder is laminar (Mohebbi et al 2017).…”

Section: Hydraulic System Dynamic Simulationmentioning

confidence: 99%

Design and experiment of energy-saving water injection pump

Zhao

Dong

Jian-wei

et al. 2020

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

An energy-saving water injection pump aimed at high-energy consumption and low efficiency of the traditional water injection pump in the later stages of oilfield exploitation is proposed. The hydraulic pump is used as the main power source to control the movement of the piston through the mechanical reversing valve, thereby driving the plunger to move left and right, supercharging the water in the plunger cylinder. First, the structural parameters of the energy-saving water injection pump were determined. Then, dynamic analysis of the pump parts was carried out. The finite element simulation of the piston cylinder and the plunger cylinder showed that the structural strength meets the requirements. The hydraulic system dynamic simulation showed that the output pressure can reach the predetermined pressure. Finally, a field test was carried out in the Jiangsu Oilfield. The results show that the device can meet the water injection requirements of the oilfield.

show abstract

“…The system comprises of electromotor, high pressure pump, fuel rail, high pressure pipes, fuel injector fuel tank, low pressure pump and inverter (Mohebbi et al 2016 one-cylinder pump which is able to create pressure amounts up to 2000 bar inside the fuel common rail. With respect to constant speed of the electromotor, its velocity and high pressure pump regulation are controlled via 3-phase LG5A inverter.…”

Section: Fig 3 Endurance Test Cycle In Order To Injector Coking Attmentioning

confidence: 99%

Experimental Study of the Coking Phenomenon Effects on Spray Characteristics of the High Pressure Diesel Injector

Sheykhvazayefi¹,

Gorji-Bandpy²,

Hajialimohammadi³

et al. 2020

JAFM

View full text Add to dashboard Cite

The novel diesel engines with advanced fuel injection systems are equipped with solenoid injectors comprising multiple small nozzle orifices which makes considerable improvement in fuel spray characteristics and engine performance along with providing high pressure fuel injection system. On the other hand, poor fuel quality, impurities and heavy metal elements in the diesel fuel, and high temperature medium in the diesel engines combustion chamber lead to remarkable deposits formation in the small holes of the nozzle. In addition, it results in partial or complete nozzle hole obstruction which is called injector nozzle coking having detrimental effects on discharged spray ideal behavior and proper engine performance. In this work, the analysis of coking phenomenon influences on diesel spray macroscopic characteristics have been done. Initially, the coked injectors with different time operation and deposit amounts are prepared under experimental and specific operating conditions. Then, the images recorded from the spatial and temporal evolution of a diesel spray in various injection and chamber pressures, are processed through the extended code in MATLAB software in order to analyze discharged fuel spray characteristics. The SCHLIEREN Imaging Method with high speed camera has been utilized in a CVC (constant volume chamber) without combustion. Non-Destructive Electron Microscopy Method of SEM (Scanning Electron Microscope) imaging was utilized in order to analyze sediments quantity and construction changes during injector working in the real engine conditions. The results show that, sediments occupy 20, 40, 75 and 90% of the total hole opening surface, respectively in the injectors with 300, 700, 800 and 900 hours operating time. By increasing the injector operation time and accumulated sediment amount on the nozzle, the discharged injector spray exhibits a more inappropriate behavior. Moreover, The Results revealed that coking has considerable effects on the spray tip penetration at low injection pressures. As injection pressure increases, the decreasing rate of the penetration length alleviates gently. In other words, at high injection pressures (1500 bar and higher) the penetration length has minor drop compared with non-utilized injectors even at 900 hours operating time, but the spray projected area can be reduced up to 28% in high chamber pressures.

show abstract

Modeling of pressure line behavior of a common rail diesel engine due to injection and fuel variation

Cited by 19 publications

References 15 publications

Availability analysis on combustion of n-heptane and isooctane blends in a reactivity controlled compression ignition engine

Availability analysis on combustion of n-heptane and isooctane blends in a reactivity controlled compression ignition engine

Design and experiment of energy-saving water injection pump

Experimental Study of the Coking Phenomenon Effects on Spray Characteristics of the High Pressure Diesel Injector

Contact Info

Product

Resources

About