The fuel system includes the fuel tank, fuel pump and strainer, fuel filter, fuel injectors, and fuel pressure regulator.
The fuel filter screens out dirt and other harmful objects from the fuel system. These objects, if not filtered out, can cause the fuel system to function improperly.
DPF- Diesel Particulate Filter
The diesel particulate filter or DPF is normally located before the catalytic converter and after the exhaust manifold. It captures many of the harmful products of diesel combustion, which include soot and diesel aerosols. These diesel particulates can be harmful to human health.
The fuel injector is an electrical valve that controls the flow of fuel into the engine.