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: throttle jacking device turbo-charger with variable geometry and electrical control motor four-valve cylinder head, diesel direct injection, lorry Cylinder head of a petrol direct injection engine M 271 Evo Mercedes Benz