turbocharger with variable blade geometry Function of the turbine and blower wheels. Adjustment of the guide vanes by means of the adjusting ring. Charging- pressure control via the vacuum cell by turning the adjusting ring. description ordernumber 1197 see also: nozzle holder with hole-type nozzle Demand-driven oil pump without suction stage (V6) twin-choke downdraught carburetor electric fuel pump