Roots supercharger This mechanical supercharger is installed in Mercedes-Benz compressor sports cars. The two rotors have three vanes each and are driven via gear wheels. The suction and compression can be shown particularly clearly. description ordernumber 1239 see also: exhaust-gas turbocharger Cummins Pump VE pump, electronically controlled with solenoid valve distributor-type fuel-injection pump with charging-pressure control