Intake Manifold Supplier
From China
The intake manifold is an important part of the engine that distributes air or an air-fuel mixture to the cylinders of an internal combustion engine. The intake manifold is fixed to the engine head, connected to the throttle body and extends through runners to each cylinder. These runners ensure even airflow, which is essential for efficient combustion. In a fuel-injected engine, it handles mostly air, while in a carbureted engine, it mixes air with fuel. Usually made of aluminum or plastic, intake manifolds also support sensors and may include passages for exhaust gas recirculation to improve performance and emissions control. Proper design optimizes engine power and efficiency.
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Features of Intake Manifold
Air Distribution
The intake manifold distributes air or mixture evenly to each cylinder. Each cylinder receives an equal amount of air for balanced combustion and optimum performance.
Airflow Optimization
Its design (including runner length, shape and volume) increases air flow rate and flow efficiency. This can increase the torque and power of the engine, especially at different speed ranges.
Integration with Engine Components
Modern intake manifolds are often fitted with sensors (such as MAP sensors), injectors (in port injected engines) and sometimes variable length runners to dynamically adjust performance to driving conditions.
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How does it affect engine?
Airflow Distribution
It delivers air (or air-fuel mixture in carbureted engines) evenly to each cylinder. Uneven distribution can cause some cylinders to run lean or rich, leading to misfires, reduced power, and higher emissions. A well-designed manifold ensures balanced combustion for smooth operation.
Engine Efficiency
By optimizing airflow, the manifold improves the air-fuel mixture’s quality, enhancing combustion efficiency. This leads to better fuel economy and lower emissions, as the engine burns fuel more completely with less waste.
Power Output
The manifold’s design, including runner length and shape, affects air velocity and volume. Longer runners improve low-end torque, while shorter ones boost high-end power. A poorly designed manifold can restrict airflow, limiting the engine’s ability to produce power, especially at higher RPMs.
Temperature Regulation
Many intake manifolds, especially plastic ones, help insulate incoming air from engine heat, keeping it cooler. Cooler air is denser, improving combustion and power. Some manifolds also have coolant passages to manage heat, preventing issues like vapor lock.
Sensor Integration
Modern manifolds house sensors like the MAP (Manifold Absolute Pressure) sensor, which helps the engine control unit (ECU) adjust fuel delivery and timing. If the manifold leaks or fails, it can disrupt sensor readings, causing rough idling, stalling, or poor acceleration.
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