EUI Fuel System Quiz

To withstand higher loads exerted on the valve train by the EUI fuel system, valve trains were updated to include a ______________.

• Narrow injector cam lobe

• More malleable component surfaces

• Steel ceramic-alloy roller rockers

• Camshaft for injectors only

EUI injectors are capable of delivering injection pressures of _______________.

• 32,000 psi

• 35,000 psi

• 38,000 psi

• 42,000 psi

EUI nozzle valve opening pressure can vary between _______________.

• 3500-5000 psi

• 1800-2400 psi

• 4800-6200 psi

• 900-1200 psi

How is fuel pressure regulated within the EUI ?

• Camshaft profile

• Fuel charging pressure

• Engine rpm

• Poppet valve operation

Injector response time is measured in _____________.

• Mega-seconds

• Milli-seconds

• Nano-seconds

• Seconds

N3 and E3 injectors are supplied fuel pressure between _____________.

• 20-30 psi

• 30-50 psi

• 40-80 psi

• 75-90 psi

When does the injector plunger start its downward stroke?

• Injector solenoid is energized

• Charging fuel enters the injector

• Camshaft rotates to inner base circle

• Camshaft rotates to outer base circle

Where are the fuel pressure regulator valve and restricted orifice located within a EUI fuel system?

• Primary system

• Secondary system

• Return system

• Injection system

Where would a technician find a EUP installed?

• Mounted to engine block

• Mounted to cylinder head

• Located in intake manifold

• Located under the rocker cover

Which component directly actuates the EUI?

• Injector push rod

• Injector cam lobe

• Injector solenoid

• Injector rocker lever