Emission Reduction from a Light-Duty Diesel Vehicle over Two Driving Cycles through Dynamic Correction Calibration

Article Environmental Sciences

DIMINUTION OF AIR POLLUTION FROM NOX AND SMOKE/SOOT EMITTED FROM ALCOHOLS/DIESEL BLENDS IN DIESEL ENGINE AND INFLUENCE OF THE EXHAUST GAS RECIRCULATION (EGR)

Mohammed A. Fayad et al.

Summary: This study investigated the effects of butanol-diesel blends and exhaust gas recirculation (EGR) on engine performance, emissions of NOX, smoke, and particulate matter (PM) under fuel post-injection condition. The results showed that without EGR, the maximum cylinder pressure peak was achieved. Combustion of B20 and B10 led to increased brake thermal efficiency (BTE) compared to diesel fuel combustion. Reduced carbonaceous gas emissions (CO and THC) and nitrogen oxides (NOX) were observed for B20 and B10 with EGR. The addition of butanol significantly reduced smoke opacity and soot emissions, while the reduction of NOX emissions was higher for B20 compared to B10 and diesel. The PM emissions increased with EGR, but the number, concentration, and size of PM decreased for B20 and B10 compared to diesel fuel combustion.

JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT (2023)

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Article Thermodynamics

Down-speeding diesel engines with two-stage turbochargers: Analysis and control considerations

Daryoush Mirza-Hekmati et al.

Summary: This study develops an improved air-path system for diesel engines, which enhances the performance of the engine under low-speed part-load conditions and reduces emissions by adjusting the turbine expansion ratio. This method allows the engine to maintain good response during load transients.

INTERNATIONAL JOURNAL OF ENGINE RESEARCH (2022)

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Article Environmental Sciences

Diesel-fueled public transport vehicles and air pollution in Addis Ababa, Ethiopia: Effects of vehicle size, age and kilometers travelled

Lencho Kebede et al.

Summary: Emissions from diesel-fueled public transport vehicles in Addis Ababa, particularly minibuses, contribute significantly to air pollution due to their age and high smoke opacity. Shifting from minibuses to large buses can greatly reduce emissions and alleviate traffic congestion. The study supports the Ethiopian government's policy of imposing taxes on imported second-hand minibuses and promoting the importation of new large buses.

ATMOSPHERIC ENVIRONMENT-X (2022)

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Article Energy & Fuels

Experimental and numerical investigation of nitrogen oxides reduction in diesel engine selective catalytic reduction system

Damian Kurzydym et al.

Summary: The article presents a study on the reduction of nitrogen oxides in diesel car SCR system. Both experimental and numerical methods were used to analyze the system and compare it with European emission standards. The results show that the final design of the replacement part effectively reduces NOX emissions.

FUEL (2022)

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Article Environmental Sciences

Characteristics of NOx emission of light-duty diesel vehicle with LNT and SCR system by season and RDE phase

Yongjoo Lee et al.

Summary: This study conducted RDE tests by season to analyze the on-road NOx emission characteristics of diesel vehicles equipped with LNT and SCR devices, showing significant seasonal differences influenced by environmental and combustion conditions.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Review Engineering, Environmental