Engineering · Automotive Engineering
A study of dual-fuel diesel and liquefied petroleum gas engines found that replacing 20–30% of diesel energy with gas maintained brake power while improving exergy efficiency and reducing smoke. A fleet model estimated that retrofitting 30% of vehicles could cut tank-to-wheel carbon dioxide-equivalent emissions by about 6–9%, although the well-to-wheel result depends on the gas supply chain.
Drivers given detailed ecodriving tips used 11.3% less energy than drivers given no tips while driving a battery-powered Nissan LEAF. The detailed advice also led to steadier speeds, more moderate throttle use and larger reported gains in ecodriving knowledge.
An AI system using roadside cameras mapped traffic-related emissions by road segment and hour in Atlanta’s urban core. The researchers found that conventional inventories underestimated localized pollution burdens, partly because they missed the impact of inter-city freight traffic.
