Engine Fuel & Control
TTP Cessna 172 Cat.B1 Level -3 ATA73 Engine Fuel & Control Cat.B2 Level -1 FUEL INJECTION SYSTEM - DESCRIPTION AND OPERATION Description - The fuel injection system is a low pressure, multi nozzle, continuous flow system which injects raw fuel into the engine cylinder heads. The injection system is based on the principle of measuring engine air consumption to control fuel flow. More air flow through the venturi will result in more fuel being delivered to the engine, and less air flow through the venturi results in a decreased flow of fuel to engine. System components consist of the fuel/air control unit, the fuel distribution valve (flow divider), injection nozzles (4 total) and lines used to connect the components. A description of the components is as follows: Fuel/Air Control Unit - The fuel/air control unit, also known as the 'servo regulator,’ is located on the underside of the engine and integrates the functi...