What does an exhaust manifold do?
The exhaust manifold is part of the exhaust system, which functions to distribute exhaust gas and filter it so that the remaining gas from the combustion process can be more environmentally friendly.
The exhaust manifold itself is located closest to the engine cylinder head and is attached with special bolts and nuts capable of resisting extreme heat. So what is the function of this exhaust manifold for the engine? See the exhaust manifold function for the engine below ...
1. A channel for exhaust gas from the engine combustion chamber
The first function of the exhaust manifold is as a channel for exhaust gases from the engine combustion chamber. Yes, the remaining combustion exhaust gases from each cylinder of this engine will be flowed through the exhaust manifold, then to the catalytic converter and several other exhaust system components until it comes out into the free air.
The number of pipes used in the exhaust manifold depends on the number of cylinders used by the engine. The more the number of cylinders, the more exhaust pipes will be, but those pipes will combine into one or two units at the end of the exhaust manifold.
In this way, the exhaust manifold can channel all the remaining combustion exhaust gases into the exhaust system, which ends at the muffler.
2. Ensuring the engine work efficiency
The next exhaust manifold function is to ensure engine work efficiency. Yes, we cannot form and design the exhaust manifold carelessly. There are particular calculations needed relating to the engine work process and the output of the power produced by the engine.
If the diameter of the exhaust manifold pipe is too small, the power generated by the engine can decrease due to the exhaust gas flow that is not smooth and stuck in the exhaust manifold, and if the pipe diameter is too large, it will have an impact on fuel waste.
In addition, an oxygen sensor is often installed in the exhaust manifold, which functions as an ECU input to measure the oxygen level in the exhaust manifold. If there is too much oxygen, it means the mixture is lean. If it is low oxygen, it means the mixture is too rich.
The ECU will correct the amount of fuel sprayed in the engine combustion chamber so that the engine's exhaust gas can match the calculation of optimal engine power.
Therefore, the exhaust manifold has a function to ensure optimal engine work, such as saving fuel and having maximum power.
Also read:3. Dampen the explosion sound from the combustion chamber
The last function of the exhaust manifold that we know is to dampen the explosion sound that occurs inside the engine. Yes, the exhaust manifold will reduce the explosion sound produced by the engine during the combustion process in the combustion chamber.
The explosion sound that comes out of this engine combustion chamber will sound louder and deafening. With the exhaust manifold incorporated in the exhaust system, the explosion sound generated by the engine's combustion can be reduced so that it does not cause noise pollution.