13-07-2012, 12:29 PM
Fuel Injection System
Fuel Injection System.ppt (Size: 3.21 MB / Downloads: 146)
Uses pressure (not Vacuum) from an
electrical pump to spray fuel into the
intake manifold.
Provides the engine with proper
air-fuel ratio (14.7 : 1)
Advantages
Improved Atomization
Better fuel flow
Smoother idle
Improved fuel economy
Engine Throttle Valve
When butterfly valve is closed it restricts air-flow and the
resulting flow of fuel into the engine.
When accelerator is pressed, the air-flow is increased in the
intake manifold.
Engine sensors detect the resulting changes and increase fuel
flow through the injectors.
Sensor System
Monitors engine operating condition and reports this information
to ECM (computer).
Sensors are electrical devices that change resistance or voltage
with change in condition such as temperature, pressure and position.