gasogene
noun
gas·o·gene ˈga-sə-ˌjēn 
variants or gazogene
ˈga-zə-ˌjēn
1
: a portable apparatus for carbonating liquids
2
: an apparatus carried by a vehicle to produce gas for fuel by partial burning of charcoal or wood
Word History
Etymology
French gazogène, from gaz gas (from New Latin gas) + -o- + -gène -gen
First Known Use
circa 1853, in the meaning defined at sense 1