Flashcard on Low-Pressure Fuel Systems in Diesel Engines

Front

What is the primary function of the low-pressure fuel system in diesel engines?

Back

To store and supply fuel free of contaminants

Front

Why is proper operation of the low-pressure fuel supply system critical?

Back

To ensure quick starting and engine durability

Front

What is a secondary function of the fuel tank in a diesel engine?

Back

To allow fuel returned from the engine to cool

Front

What do low-pressure fuel transfer lines connect?

Back

The circuits of the low-pressure transfer system

Front

What is the role of fuel filters in the fuel system?

Back

To remove dirt contamination from fuel

Front

What are the most common contaminants found in today’s fuels?

Back

Asphaltene, air, water, microorganisms, and wax

Front

How is the low-pressure supply system prepared for cold-weather use?

Back

By using a variety of devices to condition the fuel

Front

What is the purpose of fuel transfer pumps?

Back

To move fuel from the fuel tanks to the high-pressure fuel system

Front

What indicates the need for evaluation of the low-pressure supply system? Options: High fuel costs, Complaints regarding low power and rough engine operation, Increased vehicle speed, Improved fuel economy

Back

Complaints regarding low power and rough engine operation

Front

What happens if fuel filters are replaced or if an engine runs out of fuel?

Back

The system usually needs to have air purged from the filter and lines.