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Study finds engines emit exhaust nanoparticles even when not fueled during engine braking

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Exhaust particle size distributions measured by ELPI (color map) and particle concentration measured by CPC (white line) during individual engine braking conditions (speed change from 32 km/h to 0 km/h). The starting point of engine braking is marked by a vertical green line, and the end point is marked by a vertical red line.

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New Emissions Analytics study suggests pollution from tire wear now 1,850 times worse than exhaust emissions

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In early 2020, UK-based independent testing firm Emissions Analytics published a study claiming that tire particulate wear emissions were 1,000 times worse than exhaust emissions ( earlier post ). As testament to the filtration efficiency of the latest gasoline particulate filters (GPFs), tailpipe mass emissions are now as low as 0.02

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ORNL team achieves diesel-like efficiency with SI engine

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A team at Oak Ridge National Laboratory (ORNL) has achieved diesel-like efficiency in a single-cylinder spark-ignition (SI) research engine while maintaining compatibility with stoichiometric 3-way catalyst (TWC) systems. A paper on their work is published in the International Journal of Engine Research. Splitter et al.

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Promising Delphi 1st-gen Gasoline Direct Injection Compression Ignition engine meeting ultra fuel efficient program targets

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In a presentation at the SAE 2014 High Efficiency IC Engine Symposium and then in a paper given at SAE 2014 World Congress, Mark Sellnau, Engineering Manager, Delphi Advanced Powertrain, reported that Brake Specific Fuel Consumption for the 1.8L Earlier post , earlier post.). Earlier post.) DOE UFEV program targets.

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Mercedes-AMG entry-level SL 43 features electric exhaust gas turbocharger from Formula 1 for the first time in production vehicle

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Following two variants with V8 engines, Mercedes-AMG is presenting the entry-level SL 43 version of its newly developed roadster icon. The SL 43 features an M139 in-line two-liter, four-cylinder gasoline engine with an electric exhaust gas turbocharger—used for the first time in a production vehicle.

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ExxonMobil, Corning and Toyota develop onboard membrane system to separate gasoline into octane fractions to optimize engine efficiency and performance

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ExxonMobil, Corning and Toyota have collaborated to develop an Onboard Separation System (OBS) to optimize gasoline engine efficiency and performance. The novel polymer-ceramic composite monolith membrane has been demonstrated to be stable to E10 gasoline, and typically provides 20% yield of ?100 These results were intriguing.

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New Mercedes-AMG SL 43 features engine with electric exhaust gas turbocharger derived directly from Formula 1

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liter turbocharged M139 engine featuring an electric exhaust gas turbocharger. The electric exhaust gas turbocharger solves the conventional trade-off between a small, responsive turbocharger yielding a lower total output and a large turbocharger capable of high peak power with less responsiveness. An electric motor around 1.6

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