Effect of diesel injection timing on the combustion of natural gas/diesel dual-fuel engine at low-high load and low-high speed conditions

Yousefi, Amin; Guo, Hongsheng; Birouk, Madjid

doi:10.1016/j.fuel.2018.08.064

Cited by 104 publications

(36 citation statements)

References 24 publications

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“…In the article [13], it was experimentally defined that applying more advanced pilot fuel injection timings within the range of the timings of a conventional diesel engine results in an increase in the maximum cylinder pressure, efficiency and NO x emissions throughout the range of speed and load conditions. Moreover, applying more advanced pilot fuel injection timings results in a decrease in unburned CH 4 at low-load and low-speed conditions.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

Kozlov¹,

Grinev²,

Теренченко³

et al. 2019

Energies

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Modern research in the area of internal combustion engines is focused on researching and investigating the technologies that will improve fuel efficiency and decrease emissions. Application of dual-fuel engines is considered as a potential solution to these problems. In the dual-fuel engine, a natural gas-air mixture is ignited by a small amount of the diesel fuel directly injected into a combustion chamber. Pilot fuel injection parameters can strongly effect the combustion process. The aim of this paper is to investigate the effect of such fuel-supply parameters as pilot fuel mass, pilot fuel injection pressure, pilot fuel injection timing and excess air ratio on the combustion process. Investigation is based on the data obtained during bench tests conducted with the use of measurement equipment. The dependences of engine characteristics from the fuel supply parameters under review were obtained based on the results of the experimental study. Optimal values for every investigated fuel-supply parameter were chosen based on the obtained results. Over the course of the investigation, the coefficient for heat release rate according to the Vibe equation was calculated for each operating point.

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Section: Introductionmentioning

confidence: 99%

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

Kozlov¹,

Grinev²,

Теренченко³

et al. 2019

Energies

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“…It is clear that BTE is higher by 20.33% for retarded timing and lower by 9.26% for advanced timing in the same engine. The improvement in efficiency is caused by the quick start of combustion with continuous burning in power stroke as well [16,17].…”

Section: Performance Analysismentioning

confidence: 99%

An experimental investigation on a low heat rejection diesel engine using waste plastic oil with different injection timing

Paranthaman¹,

Dharmalingam²,

Antony³

et al. 2020

Therm sci

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The disposal of waste plastic solids are becoming more than a crisis with respect to environmental safety. Proper disposal system may either be very expensive or leads to side effect. Hence researchers are looking for suitable methods to reuse them. Oils as substitute for petroleum products in internal combustion engines are gaining focus in India, because of its potential to generate large scale employment and relatively low environmental poverty. The present work aims at utilizing this waste plastic oil in a low heat rejection retarded timing engine whose combustion chamber surface is coated with partially stabilized zirconia (PSZ) ceramic. The influence of fuel injection timing was studied to completely understand the waste plastic oil performance in low heat rejection engine. The results revealed great improvement in performance, and emission characteristics. As a compensation, NOx formation was slightly increased. Overall performance of the low heat rejection engine with waste plastic oil fuel was better with 14⁰ bTDC retarded injection time.

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“…Similarly, the BSEC reduced by 11.73% when the DIT increased to 25 • CA BTDC under the medium-load condition and 80% SR compared to the corresponding BSEC value in the pure diesel working condition. Lower BSEC implies an efficiency promotion in the dual-fuel mode due to the prolonged ignition delay and higher flame velocity owing to the DIT advancing [14].…”

Section: Brake Specific Energy Consumptionmentioning

confidence: 99%

“…Additionally, the usage of exhaust gas recirculation (EGR) and the air throttling strategy has been reported [10], and the study of optimal operation strategy for EGR rate was studied to run the engine with low emissions of CO 2 and HC simultaneously under low load conditions [13]. Other studies have also described the effects of DIT and in-cylinder turbulence ratio on the in-cylinder combustion of engines working in the dual-fuel mode [14,15]. The work of Yousef et al demonstrated that increasing the DIT could effectively reduce emissions of unburned methane and greenhouse gases when engines operate under low loads.…”

Section: Introductionmentioning

confidence: 99%

Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions

et al. 2019

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A throttle can be installed on the intake pipe of a natural gas (NG)/diesel dual-fuel engine to control the excess air ratio of the air-fuel mixture by adjusting the air intake. Building on a previously proposed NG/diesel dual-fuel supply strategy using the adjustment of excess air ratio, this work further studied the effects of different injection timing schemes on output power, fuel efficiency, and pollutant emissions of a dual-fuel engine under low to medium load conditions. In the experiment, the engine was operated at a speed of 1600 r/min, under either low (27.1 N·m) or medium (50.6 N·m) loads, and the NG substitution rate was either 40%, 60%, or 80%. The effect of different injection timing schemes on the combustion performance of the engine under low to medium load conditions was studied based on in-cylinder pressure changes detected by a pressure sensor. Experimental results showed that under medium-speed low-load conditions and a NG substitution rate of 40%, setting the diesel injection timing to 27 °CA BTDC increased the engine output power by 9.03%, reduced the brake specific energy consumption (BSEC) by 13.33%, and effectively reduced CO, CO2, and HC emissions. Under medium-speed medium-load conditions with a NG substitution rate of 80%, setting the diesel injection timing to 25 °CA BTDC increased the engine output power by 14.62%, reduced the BSEC by 11.73%, and significantly reduced CO, CO2, and HC emissions.

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Effect of diesel injection timing on the combustion of natural gas/diesel dual-fuel engine at low-high load and low-high speed conditions

Cited by 104 publications

References 24 publications

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

An experimental investigation on a low heat rejection diesel engine using waste plastic oil with different injection timing

Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions

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