FUEL PRESSURE ADJUSTING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a fuel pressure adjusting system having a long service life. SOLUTION: This fuel pressure adjusting system 10 including both air rail 20 and fuel rail 22 has the constitution that an atomized air i3 injected to the fuel which is supplied to the injector. This system 10 also keeps a fuel pressure inside the system at a higher coincidence pressure level than the air rail pressure. A primary pressure sensor 32 and a secondary sensor 42 are different pressure sensors which measure each air pressure and fuel pressure and change the measured values to the primary and the secondary electronic signals, then feed them to the control circuit 16. The control circuit has a fuel pump which is controlled by closed loop based on the primary and the secondary circuits. The fuel pump is in the connected condition with the fuel rail, and it adjusts the fluid pressure inside a fuel rail according to the pulse width insulating signal which is sent by the control circuit.