Effects of low reactivity fuel characteristics and blending ratio on low load RCCI (reactivity controlled compression ignition) performance and emissions in a heavy-duty diesel engine

Benajes, Jesús; Molina, Santiago; García, Antonio; Monsalve‐Serrano, Javier

doi:10.1016/j.energy.2015.06.088

Cited by 123 publications

(42 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, RCCI uses two injectors, each for one fuel. It has been reported that high efficiency, along with NOx and soot reduction, can be obtained when using higher amount of low reactive fuel [13]. High reactive fuels are used either to trigger the combustion or initiate the LRF's combustion [56].…”

Section: Fuel Reactivity Controlmentioning

confidence: 99%

“…As soon as the combustion was initiated, its evolution was determined by low reactivity fuel characteristics and high reactive fuel stratification. Increase in low reactivity with high reactive fuel stratification led to less combustion duration and high rate of heat release [13]. In the case of combustion phasing control using fuel proportions, CA50 remains the index for control.…”

Section: Fuel Proportionsmentioning

confidence: 99%

“…The self-ignition temperatures have to be considered previously before selecting the fuels. Another method in the RCCI concept is injecting the two fuels in the intake manifold which produces an almost uniform air-fuel mixture inside the cylinder [13,15]. Considerations about other factors like the engine's compression ratio, fuel's octane number and cetane number are also important in implementing the RCCI concept.…”

Section: Introductionmentioning

confidence: 99%

“…RCCI uses two different fuels, namely low reactive fuel (LRF) and high reactive fuel (HRF). Generally, LRF is injected in the manifold whereas the HRF is injected directly into the cylinder [13]. Combustion starts with the auto ignition of HRF and air followed by the combustion of LRF and air [14].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Current trends on combustion control methods using fuel reactivities

Sankaralingam¹,

Venugopal²

2016

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

Compression ignition (CI) engines are used in heavy duty engine applications due to their high torque capability and thermal efficiency. However, high NOx and smoke emissions are the challenges in using CI engines. Homogeneous charge compression ignition (HCCI) is one of the best methods to reduce NOx and smoke emissions. However, controlling the combustion for an entire range of operation in HCCI mode is a challenging task. Different methods like fast thermal management (FTM), exhaust gas recirculation (EGR), turbo charging and reactivity controlled compression ignition (RCCI) are reviewed and discussed in this article. RCCI is similar to HCCI, which uses reactivities of two different fuels to control combustion. The combustion objectives of HCCI such as less NOx and soot emission can also be obtained through this method. Combustion control based on reactivities of various fuels (RCCI) is discussed significantly. Fuels that have different reactivities can help to control the combustion phasing and thereby reducing the emission. Two different fuels can be injected together into the manifold or one fuel can be injected in the port and other in the combustion chamber directly for reactivity based combustion control. The technological development in different combustion control methods is reviewed and discussed in this article which is a useful knowledge base for further research investigations. When compared to other combustion control methods, RCCI is found to be advantageous in all perspectives such as cost, flexibility in control, simplicity and wide range of operation.

show abstract

Section: Fuel Reactivity Controlmentioning

confidence: 99%

Section: Fuel Proportionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Current trends on combustion control methods using fuel reactivities

Sankaralingam¹,

Venugopal²

2016

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…Most of the RCCI experiments were carried out with port fuel injection and direct injection combinations where the low reactive fuel was injected into the port, while the high reactive fuel was injected directly into the cylinder [17][18][19]. This method is limited as the variation of the local reactivity depends only on the high reactive fuel distribution, which in turn determines the local reactive index value.…”

Section: Introductionmentioning

confidence: 99%

Diesel/CNG Mixture Autoignition Control Using Fuel Composition and Injection Gap

et al. 2017

View full text Add to dashboard Cite

Combustion phasing is the main obstacle to the development of controlled auto-ignition based (CAI) engines to achieve low emissions and low fuel consumption operation. Fuel combinations with substantial differences in reactivity, such as diesel/compressed natural gas (CNG), show desirable combustion outputs and demonstrate great possibility in controlling the combustion. This paper discusses a control method for diesel/CNG mixture combustion with a variation of fuel composition and fuel stratification levels. The experiments were carried out in a constant volume combustion chamber with both fuels directly injected into the chamber. The mixture composition was varied from 0 to 100% CNG/diesel at lambda 1 while the fuel stratification level was controlled by the injection phasing between the two fuels, with gaps between injections ranging from 0 to 20 ms. The results demonstrated the suppressing effect of CNG on the diesel combustion, especially at the early combustion stages. However, CNG significantly enhanced the combustion performance of the diesel in the later stages. Injection gaps, on the other hand, showed particular behavior depending on mixture composition. Injection gaps show less effect on combustion phasing but a significant effect on the combustion output for higher diesel percentage (≥70%), while it is contradictive for lower diesel percentage (<70%).

show abstract

Effects of gasoline fumigation on exhaust emission and performance characteristics of a diesel engine with mechanically‐controlled fuel injection pump

Hoseinpour

Sadrnia

Ghobadian

et al. 2017

Env Prog and Sustain Energy

View full text Add to dashboard Cite

One of the various efforts to reduce PM and NO emissions from modern diesel engines is the use of light fuels fumigation as supplement to pilot injected diesel fuel. Present work aims at developing a fumigation system for introduction of gasoline in a diesel engine with mechanically‐controlled fuel injection pump and to determine its effects on emission. Experiments were performed on a 4‐cylinder direct‐injection diesel engine operating at two constant engine speeds for different engine loads. Diesel fuel was considered as baseline fuel and gasoline was inducted as fumigation in intake manifold at two different ratio on every operation modes. The experimental results show that with gasoline fumigation, the specific NOx and CO2 emission decreased to about 28, and 7% (averaged on all engine loads), respectively in comparison with baseline diesel case. While smoke opacity decreases at high loads up to 50%. However, increase in the specific CO and HC emission have been found after use of premixed gasoline at all loading conditions. Moreover, gasoline fumigation can improve brake thermal efficiency slightly at intermediate and high loads. Thus, gasoline fuel as premixed fuel with fumigation method showed a favorable potential in terms of reduction of main emissions and improvement performance in diesel engines with mechanically‐controlled fuel injection pump. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1845–1852, 2018

show abstract

Effects of low reactivity fuel characteristics and blending ratio on low load RCCI (reactivity controlled compression ignition) performance and emissions in a heavy-duty diesel engine

Cited by 123 publications

References 38 publications

Current trends on combustion control methods using fuel reactivities

Current trends on combustion control methods using fuel reactivities

Diesel/CNG Mixture Autoignition Control Using Fuel Composition and Injection Gap

Effects of gasoline fumigation on exhaust emission and performance characteristics of a diesel engine with mechanically‐controlled fuel injection pump

Contact Info

Product

Resources

About