The injector consists of a nozzle similar to the conventional “nozzle & nozzle holder”, an orifice that controls the injection rate, the command piston, and…
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The injector injects the pressurized fuel in the rail into the engine combustion chamber at the optimal injection timing, injection quantity, injection rate, and injection…
The pressure discharge valve controls the fuel pressure in the rail. When rail fuel pressure exceeds the target injection pressure, or when the engine ECU…
The flow damper reduces the pressure pulsations of the fuel in the pressurized pipe and supplies fuel to the injectors at a stabilized pressure. The…
The rail pressure sensor (Pc sensor) is installed on the rail. It detects the fuel pressure in the rail and sends a signal to the…
The pressure limiter opens to release the pressure if abnormally high pressure is generated. If pressure within the rail becomes abnormally high, the pressure limiter…
The function of the rail is to distribute fuel pressurized by the supply pump to each cylinder injector. The shape of the rail depends on…
Supply Pump Overall Fuel Flow • The fuel is suctioned by the feed pump from the fuel tank and sent to the SCV. At this…
• The HP4 supply pump component parts and functions are basically the same as for the HP3. The explanations below only cover those points on…