Improved combustion performances and lowered emissions of CNG-diesel dual fuel engine under low load by optimizing CNG injection parameters

Yuvenda, Dori; Sudarmanta, Bambang; Wahjudi, Arif; Muraza, Oki

doi:10.1016/j.fuel.2020.117202

Cited by 42 publications

(23 citation statements)

References 49 publications

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“…Therefore, to improve the performance of CNG engines, enhanced injection methods were developed [16]- [18]. Xu [16] applied the pre-injection method on CNG vehicles compared to diesel engines.…”

Section: Introductionmentioning

confidence: 99%

“…Xu [16] applied the pre-injection method on CNG vehicles compared to diesel engines. Yuvenda [18] reduced the time for its injection into the engine, while Nguyen [17] developed a model with one hole. These three studies focused on developing the injection method for engine performance without discussing the control system during deceleration.…”

Section: Introductionmentioning

confidence: 99%

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Modelling Fuel Cut Off Controller on CNG Engines Using Fuzzy Logic: A Prototype

Munahar¹,

Setiyo²,

Saudi³

et al. 2022

Int. J. Adv. Sci. Eng. Inf. Technol.

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Compressed Natural Gas (CNG) is an alternative solution to the limited availability of fossil energy. CNG use's advantages include high octane value, applicable to vehicles requiring large power, cost-effectiveness, and lower emissions. However, applying the old CNG kit leaves emission problems and fuel wastage during deceleration. Although numerous studies have been carried out with numerous variables to improve engine performance and emissions, reports regarding deceleration interventions are still limited. Therefore, this study proposes enhanced modeling to optimize the fuel cut-off controller by applying fuzzy logic by controlling the throttle valve position based on the input sensor of the engine. Engine dynamics, fuel characteristics, and intake systems are considered strictly in the development of the control system to obtain more precise results that refer to the complete combustion process. The designed model has advantages over previous studies, which focused on achieving CNG AFR stoichiometry to improve fuel economy by using the fuel cut-off method during deceleration. The results showed that fuel savings could be increased during deceleration by cutting off fuel flow to the engine. This can be seen from the increase in AFR ± 57% and decrease ± 38% -67% in CNG flow rate during deceleration which is promising to be widely applied. In the future, the proposed model could be used as part of the vehicle component in optimizing the fuel consumption that will support green technology sustainability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling Fuel Cut Off Controller on CNG Engines Using Fuzzy Logic: A Prototype

Munahar¹,

Setiyo²,

Saudi³

et al. 2022

Int. J. Adv. Sci. Eng. Inf. Technol.

View full text Add to dashboard Cite

show abstract

“…This may result in the DF combustion process becoming ineffective. Therefore, the power of the engine is also somewhat lower than that of a diesel-only engine (Yuvenda et al 2020) A study that was carried out by Tarabet et al (2014) analysed the combustion of DF and a mixture of DF and CNG (an air-fuel mixture DF+CNG), as well as a mixture of bio-DF and CNG (bio-DF+CNG) in a diesel engine at light (20%) and heavy (90%) loads. Research indicated that at 20% load, the maximum combustion pressure of the DF was somewhat higher than that of the alternative.…”

Section: Introductionmentioning

confidence: 99%

The Impact of a Two-Phase Diesel Fuel Pilot Injection on the Compressed Natural Gas Air–fuel Mixture Combustion Process in a Diesel Engine

et al. 2022

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Nowadays, there is a global trend towards the use of alternative fuels in order to reduce environmental pollution. For example, Compressed Natural Gas (CNG) has become more widely used around the world. The use of different fuels in engines affects the combustion process and efficiency, with the latter potentially being reduced by such means as, for example, the use of gaseous fuels in conventional diesel engines. Therefore, it is also important to know how CNG combusts in a diesel engine and how the combustion process can be improved. Consequently, the aim of the study is to give an overview of the effect of divided Diesel Fuel (DF) pilot injection on the combustion process of a naturally aspirated diesel engine using dual-fuel mode, with one fuel being DF and the other CNG. The focus of the article is on the commonly used engines on which the diesel injection system works regularly, and CNG fuel is injected into the intake manifold as an additional fuel. The engine DF quantity and injection timing are regulated by the acceleration pedal. The article provides an overview of the diesel and dual-fuel combustion process, and compare the DF and dual-fuel combustion processes. For this purpose, a test was carried out in order to measure the various involved parameters, such as the combustion pressure, torque, and fuel consumption. The results demonstrated that ignition delay does not significantly vary with the use of gas as a fuel source, and the maximum combustion pressure is actually higher with gas. The combustion is more rapid in dual-fuel mode and results indicate that when using dual-fuel mode on regular engines, it would be necessary to regulate the pre- and main-injection timing.

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“…In this range, HC, CO and significantly CO2 emission of the dual-fuel engine are reduced [20]. Additionally, in the low load range, a delay in CNG injection timing (130°ATDCcrank angle degree manually set in ecu algorithm) is proposed resulting in an increase in cylinder pressure and an increase in HRR with a decrease in HC, CO and PM emissions [21]. The optimal CNG injection timing for a dual-fuel engine at low load was considered to be 110°CA.…”

Section: Introductionmentioning

confidence: 99%

Catalyst Conversion Rates Measurement on Engine Fueled with Compressed Natural Gas (CNG) Using Different Operating Temperatures

Szpica

Dziewiatkowski

2021

mech

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Further restrictions on the use of compression-ignition engines in transportation are prompting the search for adaptations to run on other fuels. One of the most popular alternative fuels is Compressed Natural Gas (CNG), which due to its low carbon content can be competitive with classical fuels. This paper presents the results of testing a Cummins 6BT compression ignition engine that has undergone numerous modifications to convert to CNG power. The sequential gas injection system and the ignition system were installed in this engine. The compression ratio was also lowered from 16.5 to 11.5 by replacing the pistons. Tests conducted on an engine dynamometer were to show the differences in emission and conversion in the catalyst of hydrocarbons contained in the exhaust gases. Two structurally different catalysts operating at different exhaust temperatures (400 and 500)±2.5°C were used. The catalyst operating at 500±2.5°C showed a 23.5% higher conversion rate than the catalyst operating at a lower temperature in the range of the speed range tested. Also the external indicators, such as power and torque for the case of higher operating temperature took values over 70% higher. The research is one of the stages of a comprehensive assessment of the possibility of adaptation of compression ignition engines to CNG-only fueling.

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Improved combustion performances and lowered emissions of CNG-diesel dual fuel engine under low load by optimizing CNG injection parameters

Cited by 42 publications

References 49 publications

Modelling Fuel Cut Off Controller on CNG Engines Using Fuzzy Logic: A Prototype

Modelling Fuel Cut Off Controller on CNG Engines Using Fuzzy Logic: A Prototype

The Impact of a Two-Phase Diesel Fuel Pilot Injection on the Compressed Natural Gas Air–fuel Mixture Combustion Process in a Diesel Engine

Catalyst Conversion Rates Measurement on Engine Fueled with Compressed Natural Gas (CNG) Using Different Operating Temperatures

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