Exam 29: Cummins Hpi-Tp

Technician A says that Cummins ISX, HPI-TP injectors are mechanically actuated with no integrated electronic components. Technician B says that injection timing in an HPI-TP injector is variable and managed by the engine ECM. Who is correct?

Technician A says that in an ISX engine using HPI-TP injectors, one metering actuator is responsible for fueling the front three cylinders and another for the rear three. Technician B says that on the same engine, one timing actuator manages timing on cylinders #2 and #5. Who is correct?

In the Cummins HPI-TP fuel system, what is the control variable in the hydraulic equation used to determine injected fuel quantity?

Which pair of actuators are located outboard on the IFSM on an HPI-TP fuel system?

Where does the post-2007 ISX hydrocarbon injector used to dose the DPF receive its fuel from?

Which of the following is true of the camshafts used in a pre-2010 Cummins ISX engine?

What is the specified rail pressure in an HPI-TP fuel system?

When does Cummins the HPI-TP injector mechanical stroke that results in injecting fuel take place?

Technician A says that all fuel injected into the engine cylinders in an HPI-TP fuel system must first pass through one of two timing actuators. Technician B says that there are a total of four rail actuators on an HPI-TP fuel system. Who is correct?

Which of the following correctly describes the cylinder head(s) used on a pre-2010 ISX HPI-TP fueled engine?

When the HPI-TP timing chamber has the most amount of fuel charged to it, which of the following should be true?

Which of the following correctly describes the role of the fuel delivered to the HPI-TP injector by the timing actuator?

At the end of an HPI-TP injection cycle, which of the following is true?

Cummins Intebrake operation is being discussed. Technician A says that three solenoids are used to manage six progressive levels of braking. Technician B says that when solenoid #1 is energized, engine braking is effected on #1 engine cylinder only. Who is correct?

What must be used to time the camshafts in a Cummins ISX engine?