Exhaust Emission Systems - ALFA Romeo: Description

Alfa Romeo uses mechanical fuel injection and engine modifications to obtain low exhaust emission levels. Ignition timing and accurate control of fuel injection are key factors in Alfa Romeo's control of exhaust emissions. With proper fuel distribution and combustion control, engines do not need auxiliary exhaust emission devices. Fuel injection system consists of injection pump, control unit, injector nozzles, idle air adjuster and equalizer, electric fuel pump, fuel lines, and connecting levers. Four air intake ducts, all the same length, and four air throttle valves on a common shaft are used to equalize air/fuel ratios between each combustion chamber.