Betydelsen av korta motoravstängningar och körtid för avgasemissioner från bensindrivna bilar med och utan katalysator

• Extra exhaust emissions after short, 10 to 60 minutes, engine stops appearnot to approach zero linearly as the stop time goes to zero. Particularlylarge deviations are those of nitrogen oxide (NOx) and particulates forcars without as wellas with catalyst. Extra NOx emissions for catalyst cars are higher for 1 hstop time than both for shorter and longer stop time. Large systematicvariations in emission levels were confirmed for extended driving distanceduring dynamometer runs also after a 23 km warm-up. From this follows thatthe NOx reduction with time estimated in national inventories, if thesecircumstances are considered, can be expected to decrease.

Nyckelord

Swedish

Sweden

Emission

Motor

Stop

Catalytic converter

Petrol

Cold starting

Nitrogen oxide

Particle

Laboratory

Measurement

Temperature

Road: Vehicles and the environment

Road: Vehicles and the environment

Publikations- och innehållstyp

vet (ämneskategori)

rap (ämneskategori)