Exam 22: Port-Helix Metering Injection Pumps

Technician A says that only offshore engines are permitted to use port-helix metering fuel systems on EPA MY 2010 compliant and later engines. Technician B says that port-helix metering injection pumps can be used on current diesel engines when the peak power rating is less than 70 BHP (52 kW). Who is correct??

If there was a complete electrical failure in an electronically-managed Bosch PE 8500 fuel pump, which of the following would result?

What event causes pressure collapse to occur in the pump chamber of a port helix metering pump?

At what pressure is the fuel gallery in a port helix metering pump charged?

At what point during effective stroke does the slug of fuel in the pump chamber unite with fuel in the high pressure line?

What is the uppermost part of a plunger used on a port helix metering pump known as?

What would the phase angle be on a port-helix metering injection pump fueling a 4-stroke cycle diesel engine?

If an electronically controlled, variable timing device with a 20 degree timing window has to be static timed at 8 degrees BTDC, where can port closure occur?

What is the function of the flutes machined into a delivery valve?

Which of the following is true about actual plunger stroke in a port helix metering injection pump?

Which sensor must be removed from a V-MAC II, Bosch PE8500 fuel injection pump, to perform electronic static timing?

What component is responsible for managing plunger effective stroke?

When an altitude compensator is used on the governor of a hydromechanical port-helix metering injection pump, what does it do?

In an operating port-helix metering injection pump, the term dead volume fuel refers to: