ELECTRONIC TD5

Now we’re getting sophisticated. A twin stage pumps submerged in the fuel tank sends fuel tank sends fuel via a filter and pressure regulator direct to the electro mechanical injectors. Surplus fuel flows through a fuel cooler on the side of the engine. It then flows back to the tank or is recirculated. You’ll notice there’s no injector pump. The injectors themselves carry out the final pressurization of the fuel.

Each injector is operated partly by n electrical solenoid valve, and partly by a pushrod in the bore of the injector which is moved by the engine camshaft via a rocker. Fuel continually flows through the injector body and out into the return line. When the ECM signal fuel to be injected into the cylinder, the solenoid valve closes the return outlet from the injector, locking the fuel inside. As the camshaft moves the injector’s pushrod down, the trapped fuel is compressed to 1500 bar, which lifts the injector nozzle and the fuel is forced into the engine cylinder.