NOx–Smoke Trade-off Characteristics in a Palm Oil-Fueled CRDI Diesel Engine under Various Injection Pressures and EGR Rates

Wu, Guirong; Ge, Jun Cong; Kim, Min Soo; Choi, Nag Jung

doi:10.3390/app12031069

Cited by 6 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although some fuel blends increase carbon monoxide quantity, other reaction products, such as nitrous oxides and hydrocarbons, were reduced, improving CRDI engine combustion characteristics. Similarly, dimethyl ether or biodiesel and hydrogen combinations improved performance, as mentioned in [43,44]. The hydrogen addition reduced all three harmful exhaust compounds while decreasing the brake thermal factor, improving engine efficiency.…”

Section: Improving Renewability Of Direct Injection Fuel Systemsmentioning

confidence: 69%

“…Adding crude palm oil resulted in a trade-off in emission and performance characteristics. A change in fuel properties also results in a change in CRDI engine performance, having various percentage biofuel mixtures being tested and resulting in a different performance for each study [44,45]. For example, adding the decarbonizing additive to the PB20 fuel mixture resulted in lower efficiency, as shown in Figure 9.…”

Section: Improving Renewability Of Direct Injection Fuel Systemsmentioning

confidence: 99%

See 1 more Smart Citation

Renewability and Robustness Analysis and Review for Sustainable-Technology Propulsion Systems in Modern Transportation Infrastructure Administration

Covaci,

Gălătuș,

Petreuș

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

Recently, major climate events highlighted the increasing need to use sustainable technologies in the transportation domain. Energy production infrastructure, storage, and propulsion systems still rely on non-sustainable technology for economic growth. Therefore, this study reviews the modern transportation propulsion systems and transportation infrastructure components, describing the possible outcomes for several future directions based on prototypes and study advances. The in-production vehicles were reviewed for providing immediate, robust, and renewable solutions for the existing non-sustainable transportation infrastructure. The study continues with extended-capability vehicles and their limitations and vulnerability based on the current infrastructural circumstances. An alternative energy transfer infrastructure has been concluded to possibly provide the necessary capabilities to approach a neutral carbon footprint and mitigate ongoing climate adverse events. The hypothetical prototype uses distance energy transfer to bypass the described environmental constraints and provide a direction for achieving a possibly sustainable and economically evolving infrastructure.

show abstract

Section: Improving Renewability Of Direct Injection Fuel Systemsmentioning

confidence: 69%

Section: Improving Renewability Of Direct Injection Fuel Systemsmentioning

confidence: 99%

Renewability and Robustness Analysis and Review for Sustainable-Technology Propulsion Systems in Modern Transportation Infrastructure Administration

Covaci,

Gălătuș,

Petreuș

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…It was found that inlet air temperature had a strong influence on low temperature reaction and HCCI combustion timing, while a higher premixed ratio had more influence on reducing NOx emissions. Wu et al [23] investigated the influence of palm oil diesel blends on Nox-smoke trade off characteristics in a CRDI diesel engine at different engine pressures and exhaust recirculation conditions. It was understood that, at high injection pressure, the smoke formation reduced but NOx emissions increased.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Effects of DEE Pilot Injection on a Biogas-Fueled HCCI Engine at Different Injection Locations

et al. 2023

View full text Add to dashboard Cite

One of the popular ways to minimise the impact of emissions produced by engines is by enabling alternative fuels. Out of the many trending options for alternative fuels, biogas provides some unique advantages, such as being considered to be environmentally friendly, obeying the laws of renewable energy and generating the smallest carbon footprints. The two major drawbacks of traditional diesel engines are their high rate of NOx and significant amount of soot. The best candidates for overcoming these issues are HCCI engines; HCCI engines can provide better control over NOx generation and overall thermal efficiency can be improved to a greater level. These types of engines are compatible with both SI and CI. Now, to understand and analyse the behaviour of HCCI, the present work was focused on a modified single-cylinder CI engine. It was made to operate in HCCI mode by enabling the combination of biogas, along with diethyl ether (DEE), as a fuel mixture. To achieve better combustion, biogas was combined with air, while DEE acted as an ignition source, which can be introduced at three different locations. In total, the experiment was performed sixty times so as to achieve the best injection position. To obtain this information, other parameters, such as biogas flow rate, torque, methane fraction and DEE injection position, were also incorporated. The main results were consolidated by warping the output parameters such as brake thermal efficiency, equivalence ratio, air–fuel ratio, and brake-specific fuel consumption. Emission such as CO, HC, NOx, and smoke were taken into account. The results indicate that port injection provides higher thermal efficiency than manifold injections, while lower emissions were observed in manifold injections.

show abstract

“…Diesel engines show poor cold start performance at low temperatures, for instance, high emissions, high fuel consumption and long cranking time [1]. Various methods were investigated to improve the engine performance, including pilot injection [2,3], fuel optimization [4][5][6][7][8][9], thermal barrier coating [10] and intake air preheating [11]. However, diesel engines still face great challenges.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Preheating Strategy on the Combustion Process of the Intake Manifold Burner

Wang

2022

Applied Sciences

View full text Add to dashboard Cite

The intake air preheating is an effective method to improve the cold start performance of diesel engines. The combustion process and ignition probability were investigated in the present study. The average flame area (AFA) during the steady stage of the combustion process was used to evaluate the effects of various factors on combustion. The increase of voltage was found to enhance the combustion process, while the increased diesel flow rate first promoted the combustion before deteriorating it. The increased intake air flow velocity enhanced the combustion within 2.64 m/s, and excessive air flow velocity hindered the combustion from 2.7 to 3 m/s. The cross-distributed vortex clusters in the combustion chamber, periodic diesel evaporation and vortexes with opposite rotation directions in the vicinity of the intake manifold burner were believed to be the main reasons for flame stripping and swirl motion. The temperature rise in the exhaust pipe was recorded to investigate the thermal distribution. The warm air was concentrated in the upper region because of the buoyancy effect of the flame. With the air flow velocity increasing from 1.4 to 10 m/s, the average temperature rise increased first before decreasing, while the combustion efficiency increased due to the increased air flow volume.

show abstract

NOx–Smoke Trade-off Characteristics in a Palm Oil-Fueled CRDI Diesel Engine under Various Injection Pressures and EGR Rates

Cited by 6 publications

References 41 publications

Renewability and Robustness Analysis and Review for Sustainable-Technology Propulsion Systems in Modern Transportation Infrastructure Administration

Renewability and Robustness Analysis and Review for Sustainable-Technology Propulsion Systems in Modern Transportation Infrastructure Administration

Exploring the Effects of DEE Pilot Injection on a Biogas-Fueled HCCI Engine at Different Injection Locations

Effect of the Preheating Strategy on the Combustion Process of the Intake Manifold Burner

Contact Info

Product

Resources

About