This may be achieved by pre drying means, such as a pump to provide a stream of air after switch off of the engine, which air may be heated by {HEAD ~ residual heat} from the catalyst or {TAIL ~ engine} 
from
This may be achieved by pre drying means , such as a pump to provide a stream of air after switch off of the engine , which air may be heated by { HEAD ~ residual heat } from the catalyst or { TAIL ~ engine }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL