The intake and exhaust manifolds They are very important parts for the operation of the engine. Depending on the design and material from which they are made, they can confer some very different characteristics to the same propellant. For example, a variable intake manifold affects points as important as power compared to a normal one.
Same thing with exhaust manifolds., as well as with the rest of the elements of the gas emission system. You just have to see the work of trainers like Brabus, to realize that they are parts that should be replaced if you want to increase the performance of an engine to certain levels.
Intake manifold
For an internal combustion engine to work properly, it needs a plenty of airflow inside. Without oxygen, the combustion that makes it work cannot be produced. That is the main function of the intake manifold. The air intake to each of the engine's cylinders.
The reason why the characteristics of this piece affect both performance of an engine is for the fluid mechanics. It is enough that there is a miscalculation for the engine to malfunction. For example, if one of the ducts causes the air to take longer to reach its corresponding cylinder, the engine will burn fuel poorly. With the consequent appearance of cinder which comes out in the form of black smoke.
For this reason the intake manifold has a specific design, to allow the filling of the cylinders in an optimal way according to the characteristics of the engine. If you want a more air flow, they should be made as short and straight as possible. In addition, they are usually symmetrical to ensure that the same amount of air enters each cylinder. And if they can't be, at least every conduit will be made to allow the same flow.
The shape is not the only important feature of the intake manifold. Also very significant is texture inside. Normally, in racing or high-performance cars they have the polished inside down to a microscopic level so air flows faster. in the cars that they do not have direct injection, and therefore mix the air and fuel inside the manifold, the surface is rough. With this what they get is create a turbulence which contributes to a better spraying of the fuel.
gas recirculation
The intake manifold not only brings air to the combustion chambers. It is also associated with EGR valve in diesel and some gasoline. This valve releases part of the gases that have not been burned correctly in the collector. In this way, return to the cylinder to burn permanently and thus eliminate polluting emissions.
It is also normal to find engines with a recirculation system of the gases generated by hot oil. Again the purpose of the intake manifold is to get them into the engine to burn.
Faults in the intake manifold
The intake manifold is connected with the engine cylinder head. Therefore, just as she has various joints whose optimal state is essential so that there are no leaks. If part of the air pressure were lost through an opening, the engine would run poorly, giving signals such as a weird color in the smoke of the exhaust pipe.
It is more rare, but the leak can also be found in the manifold itself. This can happen in an accident in which the impact has reached the engine or due to a small crack or micro-perforation in the case of plastic manifolds. A problem whose detection can be very complicated if the leak is not in sight. Either way, wherever the leak is, can be detected by straining the ear to notice the typical hissing sound that it generates or wetting it with soap and water to see where a small bubble is generated.
Leave collectors sparkling
On some engines, the intake manifold and exhaust manifold are visible. There are even those that seek to achieve an aesthetic effect by leaving these vital parts exposed. However, for this to continue to be the case, it is advisable to keep them clean and well cared for. In the next video we tell you how to clean the engine, including metal parts like these. Removing rust and embedded dirt without damaging them is easy if you know how to:
Manifold
Once the air has been drawn to the engine and the fuel has been burned, it is time to extract the gases that have been generated. The exhaust manifold is responsible for evacuating these burnt gases inside the cylinder and taking them to the catalytic converter and the rest of the Exhaust system.
Like the intake manifolds, the exhaust manifolds are attached to the engine head by means of nuts and studs. Its design must allow smoke output is perfectly synchronized of each of the cylinders. If this were not so, the gases with different outlet pressure would interfere with each other when they converge in the same tube. The slowest (or with less pressure) would slow down in its own conduit, going back to the engine and affecting its operation considerably. There is a wide variety of exhaust manifolds on the market, which can improve the power of the engine or the comfort of use. They are normally used in deep modifications of an engine.
If you want to know more about car mechanics and how to maintain or repair the car yourself, do not miss the articles:
Images – JAK SIE MASZ, Bill Abbott
«»»As for the exhaust manifolds, they must have such a design that the air outlet of each of the cylinders is perfectly synchronized. If this were not the case, when expelling the air from a cylinder, if it meets the outlet of another cylinder, it could slow down the expulsion of air, returning to the engine and affecting it considerably»»»
A superior automotive technician says it and goes to mass….
Is it necessary to put cilicone, to the intake manifold gasket?
Or is it enough to just install it?