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Exam 26: Dual-Actuator Eui Systems

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Question 1

Multiple Choice

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When the SV solenoid is energized in twin actuator EUI, which of the following passages is immediately closed off?

A) cylinder head return gallery
B) EUI pump chamber to nozzle duct
C) nozzle valve pressure chamber
D) EUI control valve spill circuit

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Question 2

Multiple Choice

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Which of the following displacements is the metric equivalent to that of a Mack MP10 engine using twin actuator EUIs?

A) 10 liter
B) 11 liter
C) 13 liter
D) 16 liter

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D

Question 3

Multiple Choice

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What is the function of the nozzle control valve (NCV) solenoid on an E3 injector?

?Which of the following engine manufacturers uses twin actuator EUIs in their post-2013 MY EPA compliant engines?

Technician A says that E3 injectors provide the ECM with better control of combustion than the single actuator EUI injection systems they replaced. Technician B says that E3 injectors are better suited to multipulse injection than 2-terminal MEUIs. Who is correct?

When both the SV and NCV actuators in an E3 injector are energized by the ECM, which of the following should be true?

Technician A says that during an E3 injection event in single engine cycle, more than one pulse of fuel may be injected to the engine cylinder. Technician B says that when the SV actuator is energized, the E3 spill circuit is opened. Who is correct?

Which of the following is the odd one out?

If fuel in an E3 injector is being pressurized above charging pressure, which of the following actuators must be energized?

What is a typical charging pressure required by engines using E3 injectors not using SCR (built before 2010) ?

What is the only displacement DDC manufactured for their post-2007, twin-actuator, EUI-fueled Series 60 engine?

Which of the following is the primary advantage of the E3 EUI when comparing it with earlier 2-terminal EUIs?

Technician A says that E3 actuators initially draw around 10 amps when first switched in the hold status position. Technician B says that E3 actuators draw around 4 amps to hold position. Who is correct?

In which EPA model year were twin-actuator E3 EUIs introduced?

Which of the two DDEC modules occupies the SA 00/ MID 128 address on a chassis powertrain bus on a post-2007, DDEC VI EUI-fueled engine?

After changing out one E3 injector which of the following must be done to ensure that engine fueling is balanced?

What force is used to develop injection pressures in a twin-actuator E3 EUI?

Technician A says that a major advantage of a twin-actuator EUI is that the nozzle opening is 'soft'. Technician B says that 4-terminal EUIs are not so well suited to multipulse injection than the older 2-terminal EUIs. Who is correct?

Technician A says that E3 injectors are better suited to multi-pulse injection because the injection pressure is not required to collapse within the EUI between injection pulses. Technician B says that at any time the NCV actuator is energized in a E3 injector, pressure rise is created in the EUI pump chamber. Who is correct?

Which of the following E3 fueled engines is the odd one out?