In the context of fuel delivery, which term describes a system that delivers fuel at low pressure?

• A. Low pressure injection system
• B. High pressure injection system
• C. Direct injection system
• D. Carburetor system

Answer: (A)

Fuel delivery systems are defined by the pressure at which they deliver fuel. A low pressure injection system moves fuel from the tank to the engine at relatively modest pressure, typically used to feed injectors into the intake port rather than directly into the cylinder. This keeps the system simple and cost-effective, and is common in port fuel injection setups.

High pressure injection systems push fuel to much higher pressures to achieve fine atomization or direct injection into the combustion chamber, which is a different operating regime than low pressure systems. Direct injection is a type of high-pressure injection where fuel is sprayed directly into the cylinder, not the intake port. A carburetor, on the other hand, uses airflow to draw and mix fuel and air without delivering fuel under pressure through injectors.

So, the term describing a system that delivers fuel at low pressure is the low pressure injection system.