Control Strategy of Speed Segmented Variable Constant Power Powertrain of Electric Construction Machinery

Article Environmental Sciences

Influence of non-commercial fuel supply systems on small engine SI exhaust emissions in relation to European approval regulations

Lukasz Wargula et al.

Summary: This study conducted emission tests on five small spark-ignition engines used in road infrastructure development and operation. The results showed that innovative solutions reduced CO, CO2, and hydrocarbon emissions but increased NOx compounds.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2022)

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Article Environmental Sciences

Real-world emissions of construction mobile machines and comparison to a non-road emission model

Ran Tu et al.

Summary: The study found that the working mode produces the highest emissions, while the idling mode has the least variation in emissions; the emission factors suggested by the Guide are generally lower than the measured values, especially for older machines; there is a significant increase in emission factors from Stage I to Stage II machines, and machine deterioration also affects emissions.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Energy & Fuels

Practical Aspects of Cylinder Deactivation and Reactivation

Norbert Zsiga et al.

Summary: This study investigates the impact of cylinder deactivation on fuel consumption of internal combustion engines and analyzes key factors in different operational modes.

ENERGIES (2021)

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Article Environmental Sciences

Analysis of Telematics Data of Combine Harvesters and Evaluation of Potential to Reduce Environmental Pollution

Dainius Savickas et al.

Summary: The study analyzed telematics data of combine harvesters, finding that CH spent around 18% and 13% of the time in idle and transport modes respectively, and consumed approximately 12% of diesel fuel outside of direct harvesting mode, emitting 4.7 t year(-1) of GWP per machine. Field tests confirmed that optimizing the use of CH in idle and transport modes could reduce annual GWP emissions by about 1.3 t per machine. Additionally, it was determined that the driving speed of the CH during wheat harvesting significantly impacted the GWP per ton of wheat harvested, with an optimal speed of 4 km h(-1) and a wheat grain and straw feed rate of 24 kg s(-1).

ATMOSPHERE (2021)

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Article Green & Sustainable Science & Technology