What is the intake branch pipe of a car
The automobile intake branch pipe is an important part of the engine intake system, which is located between the throttle and the engine intake valve. The "manifold" in its name comes from the fact that the air entering the throttle "diverges" through the buffered airflow channels, corresponding to the number of cylinders in the engine, such as four in a four-cylinder engine. The main function of the intake branch pipe is to distribute the air and fuel mixture from the carburetor or throttle body to the cylinder intake port to ensure that the intake of each cylinder is reasonably and evenly distributed.
The design of inlet branch pipe has important influence on engine performance. In order to reduce the gas flow resistance and improve the intake capacity, the inner wall of the intake branch pipe should be smooth, and its length and curvature should be as consistent as possible to ensure that the combustion status of each cylinder is the same. Different types of engines also have different requirements for intake branches, for example, shorter manifolds are suitable for high RPM operation, while longer manifolds are suitable for low RPM operation.
The most common intake pipe material in modern vehicles is plastic, because plastic intake pipe is low cost, light weight, and can improve hot start performance, power and torque. However, plastic materials need to have high temperature resistance, high strength and chemical stability to adapt to the operating environment of the engine.
The main function of the automobile intake branch pipe is to evenly distribute the air and fuel mixture to each cylinder to ensure that each cylinder can obtain the appropriate amount of combustible mixture gas, so as to maintain the stable operation and efficient combustion of the engine . Specifically, the intake branch works with the carburetor or throttle body to ensure that each cylinder receives the right amount of combustible gas mixture, which is the basis of stable engine operation . In addition, the design of the intake branch pipe has a decisive effect on the intake efficiency of the engine. Excellent design can ensure that the cylinder is filled with enough air and fuel gas mixture, improve the engine combustion efficiency, so that the power output is more powerful .
Working principle of inlet branch pipe
Through its internal structural design, the intake branch pipe ensures that the air and fuel mixture can be evenly distributed to each cylinder. When the engine draws in air, the intake branch ensures a continuous controlled supply of air to optimize the combustion process. The efficiency of this process directly affects the engine's power output and fuel consumption .
The type of inlet branch pipe and its application in different engines
Single-plane inlet branch : has a single pressurization chamber to provide equal air distribution for all cylinders. Commonly used in engines with a narrow RPM range, such as trucks and SUVs .
dual-plane intake branch : There are two separate booster chambers designed to improve low-end torque and throttle response. Commonly used in street performance and muscle car engines .
EFI Inlet Branch : specially designed for engines with fuel injection systems. Fuel injectors are installed at the intake for precise fuel delivery and better combustion control .
Material of inlet branch pipe and its influence on performance
Intake branch pipes are typically made of a variety of materials, each with unique advantages:
Aluminum inlet branch pipe : light weight, affordable, good heat dissipation performance. Widely used in modern engines .
plastic air inlet pipe : low cost, flexible design. However, it is usually used in economy cars because it cannot withstand high temperatures.
composite air inlet pipe : combining the advantages of aluminum and plastic, it is lightweight and can withstand high temperature, suitable for high-performance vehicles .
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