DSL-202 Chap 23: Electronic Distributor Injection Pumps

Technician A says that principles of electronic signal processing are now being applied to provide more efficient diesel fuel injection systems. Technician B says more efficient fuel injection systems are being driven by the demand for cleaner engine emissions, increased engine power, quieter operation, and better fuel economy. Who is correct?

• a. Technician A

• b. Technician B

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B

The VP-44 uses what type of transfer pump?

• a. Internal piston

• b. External vane

• c. Internal vane

• d. External piston

Electronic distributor pumps were no longer used with on-highway engines manufactured after __________.

• a. 2001

• b. 2002

• c. 2003

• d. 2004

Technician A says that mechanical fuel injection systems are able to fully compensate for engine speed and load to maintain proper emissions. Technician B says that mechanical fuel injection systems could only crudely compensate for engine speed and load to maintain proper emissions. Who is correct?

• a. Technician A only

• b. Technician B only

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B

The FPCM is cooled by __________.

• a. Air

• b. Coolant

• c. Fuel

• d. Oil

Closed loop feedback includes data related to __________.

• a. Intake air temperature

• b. Coolant temperature

• c. Oil temperature

• d. All of these are correct.

VP-37 model pump systems use a needle lift sensor to vary __________.

• a. End of injection

• b. Beginning of injection

• c. Idle stability

• d. Acceleration mapping

In 1998 both misfire detection and _____________ were added to the Stanadyne DS-4 control system in order for it be compliant to OBD-II legislation.

• a. Pilot injection events

• b. Adaptive cylinder balance

• c. Timing stepper motor

• d. All of these are correct.

Idle fuel pressure of the DS-4 pump should vary between __________ psi.

• a. 100 and 125

• b. 80 and 100

• c. 50 and 80

• d. 20 and 30

The ITS motor is connected by linkage to a __________.

• a. Control solenoid

• b. Control discharge port

• c. Servo valve

• d. Pumping plunger