Deck 24: Sleeve-Metering Rotary Distributor Pumps

Question 1

Technician A says that most hydromechanical rotary-distributor diesel injection pumps are used to fuel small bore engines. Technician B says that most hydromechanical rotary-distributor diesel injection pumps are used in older indirect injection (IDI) diesel applications. Who is correct?

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

Answer 1

Both A and B

Question 2

What is used to lubricate the internal components of a Bosch sleeve-metering, rotary injection pump?

A) fuel
B) engine oil from engine lubrication circuit
C) dedicated supply of engine oil
D) dry sump

Answer 2

fuel

Question 3

At what relative speed must a sleeve metering, rotary distributor injection pump be driven when used to fuel a 4-stroke cycle diesel engine, with 6 engine cylinders?

A) half engine speed
B) engine speed
C) two times engine speed
D) six times engine speed

Answer 3

half engine speed

Question 4

How many high pressure pumping plungers are used in a Bosch type, sleeve metering, rotary distributor pump used to fuel a six cylinder engine?

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

Question 5

What is the maximum number of engine cylinders that can be fueled using a Bosch VE sleeve metering, rotary distributor pump?

A) Two
B) Four
C) Six
D) Eight

Question 6

A Bosch VE sleeve-metering rotary injection pump is used to fuel a four cylinder, automotive diesel engine. How many delivery valves would be used?

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

Question 7

What is used to control plunger effective stroke in a sleeve metering, rotary distributor pump?

A) control sleeve
B) cam plate
C) metering pressure
D) engine rpm

Question 8

What defines plunger actual stroke in a sleeve metering rotary distributor pump?

A) control sleeve
B) plunger dimension
C) engine rpm
D) cam plate

Question 9

A Bosch sleeve metering, rotary distributor pump fueled engine performs well at rated speed and load, but smokes under load at peak torque rpms. Which of the following might help correct this problem?

A) positive torque control
B) negative torque control
C) derate high idle speed
D) use fuel with higher CN

Question 10

Technician A says that the fuel shutdown device used on Bosch sleeve metering, rotary distributor pumps is known as ELAB. echnician B says that Bosch fuel shutdown solenoids latch when energized, preventing unwanted shutdown in the event of a loss of electrical power. Who is right?

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

Question 11

Which of the following best describes the operating principle of the vane type transfer pumps used on Bosch rotary distributor pumps?

A) centrifugal
B) constant velocity
C) variable cycle
D) positive displacement

Question 12

In a Bosch type sleeve metering rotary distributor pump what locks the distributor plunger into its position relative to the cam plate?

A) set screws
B) interference fit
C) a pin
D) weld

Question 13

Technician A says that a Bosch EDC controlled VE injection pump is a partial authority fuel management system. Technician B says that the EDC version of a Bosch VE pump continues to use a hydromechanical governor. Who is right?

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

Question 14

What manages control sleeve position in a Bosch EDC-VE fuel pump?

A) Accelerator position
B) Governor thrust washer
C) ECM
D) Fuel pressure

Question 15

Technician A says that when an EDC-VE injection pump is used to fuel a four cylinder engine, four pumping plungers are used. Technician B says that EDC-VE pump plungers are actuated mechanically in the same way as the hydromechanical version. Who is right?

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

Question 16

What is used to sense control sleeve position in an EDC managed, VE injection pump?

A) Engine rpm
B) Potentiometer
C) Hall effect sensor
D) Rheostat

Question 17

Which of the following will have most influence on the internal pump pressure of a Bosch EDC-VE injection pump?

A) Control sleeve position
B) ECM control valve
C) Throttle angle
D) Engine rpm

Question 18

What is use to advance the injection timing in a Bosch EDC-VE injection pump?

A) Fuel pressure
B) Centrifugal force
C) Linear proportioning solenoid
D) Latching solenoid

Question 19

When a Bosch EDC-VE fuel pump is used to fuel a V-configured, 6-cylinder engine, how many high pressure pipes are used to deliver fuel from the injection pump to the engine cylinders?

A) One
B) Two
C) Three
D) Six

Question 20

Which of the following best describes the type of injectors used with EDC-managed VE injection pumps?

A) poppet
B) pintle
C) multi-orifii
D) electrohydraulic

Question 21

Technician A says that EDC VE distributor pump fuel systems use hydraulically-actuated injector nozzles. Technician B says that EDC VE fuel systems use nozzle valves equipped with nozzle valve motion sensors (NVMS). Who is correct?

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

Question 22

What electrical principle is used by the injector nozzle valve motion sensors (NVMS) in Bosch VE fuel systems?

A) piezoelecticity
B) induction
C) potentiometer
D) Hall-effect

Question 23

If the fuel quantity actuator fails is a Bosch EDC controlled VE injection pump, which of the following would be the likely result?

A) engine derate
B) limp home mode operation
C) engine shutdown
D) no performance impact

Question 24

What controls pump plunger effective stroke in a Bosch EDC controlled, VE injection pump?

A) NVMS
B) start of injection solenoid
C) control sleeve solenoid
D) cam lift dimension

Question 25

What controls injected fuel quantity in an EDC managed, VE injection pump?

A) NVMS
B) start of injection solenoid
C) control sleeve solenoid
D) cam lift dimension

Question 26

Which of the following is going to have the most influence on internal VE pump fuel pressure at any given moment of engine operation?

A) engine rpm
B) engine load
C) injection pressures
D) leak-off pressure