EUI
When is it necessary to program the injector calibration code into the ECM?
If an injector is replaced
If an injector is reinstalled in another cylinder
Split shot injection is capable of __________ injection event(s) per cycle.
2
What function can be performed by a unit injector as a single component?
Pressurization
Timing
Metering and atomization
When discussing electronic unit pumps; Technician A says that EUPs characteristics include an individual camshaft for each pump, individual pumps for each cylinder, and incorporating high-pressure fuel lines. Technician B says that a single camshaft is used to drive each each cylinders pump. Who is correct?
Technician B
The concept of the cam-less diesel was prototyped in 1998 by __________.
Navistar
The HPI-TPI system uses a cam-driven gear pump that supplies pressurized fuel that is regulated by a __________ regulator valve.
250 PSI
The Delphi E3 EUI has ultrahigh-pressure operation, up to __________.
37,000 PSI
What components and processes do HEUI engines use to control injection events with more precision than any previous system?
Software code and electrical signals
The PT pump system changes fuel pressure supplied to the injector using an engine-driven low-pressure __________ pump.
Gear
Which filtering medium is the preferred option for EUI?
Microglass
The lower seat of the poppet valve allows __________.
Oil to enter the injector
When discussing load-based speed control (LBSC) ; Technician A states load-based speed control (LBSC) promotes efficient operation by limiting engine speed when conditions require low or intermediate power. Technician B states this feature is similar to progressive shifting, which allows maximum engine speed through all gears the driver selects. Who is correct?
A
Injector tip protrusion is directly related to __________.
Injector nozzle seal
HEUI A and B split shot injectors use a high voltage electric solenoid that requires approximately __________ volts DC to energize.
110–115 volts
The CELECT system pump output pressure is regulated to deliver fuel at a pressure of approximately __________ to a fuel rail drilled through the cylinder head.
150 psi