Assertion: diesel's engine | /r/HasAspect | less than 0.5% oxygen
Facets:
value: before the emission control
type: TEMPORAL
value: typically
type: TEMPORAL
value: in the exhaust gas stream
type: LOCATION
Source sentences:
text: Note that unlike a spark-ignited engine, which typically has less than 0.5% oxygen in the exhaust gas stream before the emission control device(s), diesel engines have a very high ratio of oxygen available.