運送屍體的車 (黑車) 的英文

coroner: ------official who investigates any violent or
suspicious death

The answer to your question should be;-
CORONER'S VAN OR CORONER'S VEHICLE

However, it should not be hearse, a vehicle for carrying
a coffin at a funeral.

2008-04-15 07:44:52 補充：
An ambulance is a vehicle equipped to carry sick or injured people to hospital, etc.
but it is also used to carry corpse to hospital in some countries so that the death can be
verified by coroner.

funeral car

http://images.google.com/images?sourceid=navclient&ie=UTF-8&rls=DGUS,DGUS:2006-12,DGUS:en&q=funeral+car&um=1