air flow adjustment by adequate shape of the air funnel different angles of the air funnel cause a good adjustment of mixture ratio to load different openings of the air funnel, which depend on height of the opening and angle of the air funnel, can be read description ordernumber 195 see also: injection-nozzle holder with hole-type nozzle and pintle-type nozzle ecotronic system (carburetor) double-acting fuel pump for DE one-vane vacuum pump