Page 355 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

regulator supplies the excess amount of fuel to the fuel tank (< 1 bar pressure) Common rail pressure sensor will
give the information to ECM /EDC the existing pressure in the common rail. Then common rail will control the
RPM of the fuel pump. Common rail will distribute the fuel to all the cylinder with equal pressure, then all cylinders
will develop uniform power, which will reduce vibration and noise of the engine.
Diesel Direct injection system

Hydraulically actuated electronically controlled unit injector (HEUI) diesel injection system
HEUI (Hydraulically Actuated Electronically Controlled Unit Injector)

HEUI Fuel System represents one of the most significant innovations in diesel engine technology in the diesel
technology. HEUI made easy of many limitations of mechanical and conventional electronic injectors, and sets
new standards for fuel efficiency, reliability and emission control. The highly sophisticated HUEI system uses

342

CITS : Automotive - Mechanic Diesel - Lesson 114 - 117