Fuel Injection Management Quiz

What does the injection management system ensure?

• Fuel is injected at the wrong time

• Fuel is injected in excess quantity

• Fuel is injected at the right time, in the right quantity, and under the right conditions

• Fuel is injected only when the engine is off

In a common rail diesel system, how are the components involved in fuel injection divided?

• By color

• By size

• Into low and high pressure regions

• By temperature

What happens to any unused fuel in the low pressure system?

• It is burned off

• It is stored in a separate tank

• It is returned at low pressure

• It is mixed with oil

Which components are included in the high pressure system of a fuel injection system?

• High pressure fuel pump, common rail, pressure sensor, control valve, injectors

• Fuel tank, fuel filter, gear pump, injectors

• Common rail, fuel tank, gear pump, control valve

• Fuel pump, injectors, fuel filter, pressure sensor

How is high pressure fuel distributed to the injectors in a fuel injection system?

• Via the common rail

• Directly from the fuel tank

• Through the gear pump

• Using the fuel filter

What component in a common rail system stores the desired pressure?

• Injector

• Accumulator (or 'rail')

• High-pressure pump

• Fuel tank

What ensures that high pressure fuel is always available for the injection process in a common rail system?

• The fuel tank

• The accumulator (or 'rail')

• The air intake system

• The exhaust system

How are the radial pistons commonly arranged in a high pressure pump?

• At 90°

• At 120°

• At 180°

• At 60°

What mechanism drives the pistons up and down in a high pressure pump?

• A timing belt

• A gear system

• An eccentric cam

• A hydraulic system

What happens at the bottom of the stroke in the pressure generation process?

• The outlet valve opens and fuel flows out.

• The inlet valve opens and the piston moves downwards.

• The inlet valve closes and the piston starts its upwards travel.

• The pressure decreases in the chamber.