What is the Function of the Intake Manifold?
2 Answers
Intake manifold is responsible for distributing the air-fuel mixture from the carburetor or throttle body to the intake ports of each cylinder. For port fuel injection engines or diesel engines, the intake manifold only distributes clean air to the intake ports of each cylinder. The intake manifold must distribute the air-fuel mixture or clean air as evenly as possible to each cylinder. To achieve this, the length of the gas flow passages inside the intake manifold should be as equal as possible. To reduce gas flow resistance and improve intake efficiency, the inner walls of the intake manifold should be smooth. Intake and exhaust manifolds are usually made of cast iron, while intake manifolds can also be cast from aluminum alloy. They can be cast as a single unit or separately.
I'm always fascinated by the inner workings of engines. The main function of the intake manifold is to evenly distribute air from the throttle body to each cylinder, much like a highway dispersing traffic flow. This ensures each cylinder receives an equal amount of air, preventing overly lean or rich mixtures in any cylinder, which could cause engine vibration or power loss. When driving, if you notice sluggish acceleration or unstable idling, it might indicate a manifold air leak or internal carbon buildup. It's important to promptly check the seals or clean it out. With proper maintenance, the manifold can improve combustion efficiency, aiding in fuel economy and extending engine life. I've seen many older cars require repairs due to manifold issues—simple upkeep can prevent major headaches.
