RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN C (2002)
Fuel Injector: Description and Operation
FUEL INJECTOR
Fig.10 Fuel Injector Location
Six individual, high-pressure fuel injectors are used. The injectors are vertically mounted (Fig. 10) into a bored hole in the top of the cylinder
head. This bored hole is located between the intake/exhaust valves.
High-pressure fuel is supplied from the injection pump, through a high-pressure fuel line, through a steel connector and into the fuel injector.
When fuel pressure rises to approximately 31,026 kPa (4,500 psi), the needle valve spring tension is overcome. The needle valve rises and fuel
flows through the spray holes in the nozzle tip into the combustion chamber. The pressure required to lift the needle valve is the nozzle opening
pressure. This is sometimes referred to as the "pop" pressure setting.
Fig.11 Fuel Injector Connections
