Deck 26: Dual-Actuator Eui Systems

Question 1

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

A) 10 liter
B) 11.1 liter
C) 12.7 liter
D) 14.0 liter

Answer 1

14.0 liter

Question 2

How is fuel delivered from the cylinder head fuel galleries to twin-actuator E3 electronic unit injectors (EUIs) in Caterpillar, Detroit Diesel, and Volvo-Mack engines?

A) annular recess in cylindrical EUI body
B) jumper pipes to the control cartridge
C) hydraulic hose the EUI inlet
D) injector high pressure pipe

Answer 2

annular recess in cylindrical EUI body

Question 3

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

A) 30 psi (2 bar)
B) 60 psi (4 bar)
C) 180 psi (12 bar)
D) 360 psi (24 bar)

Answer 3

60 psi (4 bar)

Question 4

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

A) electronic from control cartridge
B) electrical from injector drivers
C) hydraulic from fuel sub-system
D) mechanical from injector cam profile

Question 5

What mechanical feature defines the limits within which a 4-terminal EUI pulse width must take place?

A) injector cam profile
B) SRS signal
C) valve cam profiles
D) TRS signal

Question 6

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

A) 2001
B) 2004
C) 2007
D) 2010

Question 7

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

A) Switches EUI open or closed
B) Opens or closes the EUI spill circuit
C) Opens or closes the EUI nozzle
D) Triggers the ECM injector drivers

Question 8

Which of the following components function similarly in both single- and twin-actuator EUIs?

A) Nozzle control valve actuator
B) Control or spill valve actuator
C) Nozzle needle
D) Nozzle NOP shims

Question 9

How many terminals are there on a E3 injector?

A) one
B) two
C) four
D) eight

Question 10

What distinguishes a dual actuator EUI from a single actuator version?

A) pumping principle
B) control valve management
C) electrohydraulic nozzle
D) bushing

Question 11

What is the primary function of the spill valve actuator used in an E3 injector?

A) opens or closes the injector nozzle
B) opens or closes the spill circuit
C) vents and cools the injector
D) blocks fuel to the nozzle assembly

Question 12

What is the primary advantage of the E3 EUI over previous generations of single-actuator EUIs?

A) hard nozzle opening and closing values
B) soft nozzle opening and closing values
C) open nozzle design
D) closed nozzle design with VCO

Question 13

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?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 14

Where are the injector drivers located in a Series 60 engine using E3 EUIs managed by DDEC VI electronics?

A) ECU
B) CPC
C) MCM
D) PCM

Question 15

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

A) engine is running at full power
B) engine is running at peak torque
C) fuel is being injected
D) fuel is spilled to the leak-off circuit

Question 16

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?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 17

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

A) reprogram the calibration code
B) prime the injector passage
C) replace the injector cup
D) change the hold-down crab

Question 18

After replacing a set of E3 injectors in a Mack MP8 engine, the engine rhythmically hunts after being started. Technician A says that a new set of calibration codes should be downloaded and flashed to the EECU. Technician B says that the calibration codes are inscribed on the E3 injector and should be reprogrammed to the EECU. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 19

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?

A) CPC
B) MCM
C) ECM
D) PCM

Question 20

Which of the following must happen to enable a set of E3 injectors to no-fuel and therefore shutdown, an engine?

A) No EUI actuators energized
B) No plunger stroke
C) Camshaft does not ramp off IBC
D) Crankshaft ceases to rotate

Question 21

What do Caterpillar call their 4-terminal MEUI?

A) ADEM-4
B) ACERT-2
C) Gen IV
D) MEUI-C

Question 22

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

Question 23

Which of the following is the odd one out?

A) MEUI-C
B) E3 EUI
C) 4-terminal EUI
D) N3 EUI

Question 24

What is the equivalent of the control cartridge solenoid in a single actuator EUI in a twin actuator, E3 EUI?

A) Spill valve (SV) actuator
B) Direct-operated check (DOC)
C) Electrohydraulic nozzle
D) Nozzle control valve (NCV) solenoid

Question 25

Which of the following is another way of describing the nozzle control valve (NCV) used in an E3 EUI?

A) hydraulic nozzle
B) electric nozzle
C) electrohydraulic nozzle
D) pump chamber

Question 26

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

A) longer collapse phase
B) hard value nozzle closing
C) hard value nozzle opening
D) soft nozzle opening and closing values

Question 27

When an E3 EUI is actually injecting fuel to the engine cylinder, what is the status of the actuators?

A) neither one is energized
B) only SV solenoid is energized
C) only NCV solenoid is energized
D) both SV and NCV solenoids energized

Question 28

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?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 29

Technician A says that whenever an E3 injector is changed out, it is important to drain the EUI fuel supply gallery prior to removing the injector. Technician B says that when one E3 injector is changed out, the calibration codes of the unchanged five injectors must be reprogrammed.. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 30

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?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 31

What electrical pressure is used to initiate the E3 actuators on post-2007, Volvo-Mack engines?

A) 10 amps
B) 4 amps
C) 12.6 V-DC
D) 100 -V-DC

Question 32

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?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 33

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

A) SV actuator
B) NCV actuator
C) retarder actuator
D) DPF regen actuator

Question 34

Technician A says that in an E3-fueled engine, at any moment fuel is being injected to the engine cylinder, the SV actuator must be energized. Technician B says that whenever fuel is being injected to the engine cylinder the NCV actuator must be energized. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 35

Technician A says that Volvo-Mack E3 fuel calibration codes are printed on the side of each injector. Technician B says that Detroit Diesel E3 fuel calibration codes are factory programmed at initial assembly and should not be changed during the life of the vehicle. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 36

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

Question 37

Which of the following is the equivalent standard displacement of a Volvo VE D13 engine?

A) 700 cu. in
B) 800 cu. in
C) 1000 cu. in
D) 1300 cu. in

Question 38

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

A) Volvo VE-D11
B) DDC Series 60
C) Volvo VE-D16
D) Mack Trucks MP10

Question 39

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

A) ?Paccar
B) ?Mack Trucks
C) ?Detroit Diesel
D) ?Cummins

Question 40

Technician A says that Volvo use E3 injectors in their post-2013 MY engines. Technician B says that Detroit Diesel use E3 injectors in their post- 2013 MY engines. use twin actuators. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B