CPC Subgroup
F02B 23/04 the combustion space being subdivided into two or more chambers (with pre-combustion chambers F02B19/00)
Full Title
Other engines characterised by special shape or construction of combustion chambers to improve operation (engines with incandescent chambers F02B9/08) > with compression ignition > the combustion space being subdivided into two or more chambers (with pre-combustion chambers F02B19/00)