Study finds engines emit exhaust nanoparticles even when not fueled during engine braking
Green Car Congress
JANUARY 19, 2014
during decelerations and downhill driving while the engine is not fueled. Increased emissions of nucleation particles, affected by fuel sulfur content and exhaust dilution and thus proposed to be formed by sulfuric compounds, has been observed at deceleration as well. —Rönkkö et al.
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