mixture control unit of KE-Jetronic Possible demonstrations: shifting of air-flow sensor plate displacement of control plunger Function of differential pressure valves, idle-speed control device and idle-mixture adjusting screw. description ordernumber 1021 see also: Audi cylinder head with 5 valves and camshaft adjustment two-stage twin-choke downdraught carburetor 4A1 turbocharger with variable blade geometry cylinder head – four-valve engine