Dissipation of the heat that has been absorbed from combustion exhaust gases, transferring it to the valve seat inserts and valve guides.Which is the role of these valves? Valves are precision parts of the engine and have four very important tasks in motor operation: Intake and exhaust valves are elements whose function is controlling a liquid or gas flow those ones used in the intake and exhaust of a four-stroke engine are usually seat valves. The operation of the four-stroke engine is comprised of four stages, these are: To develop this process, the engine has to control gas inlet and outlet in each cylinder, this is accomplished through intake and exhaust valves that will be responsible for opening and closing the ducts at the desired times. After process is completed it is necessary that combustion gases leave the chamber and allow the cycle to repeat. When ready, this mixture goes into the combustion chamber so that this gas is burned and thus transform thermal energy into mechanical one. In the collector the air is filtered to be led to the intake manifold, where dosing of fuel mixture is done, through systems such as the carburetor or injection. This is achieved through a series of mechanisms which form a system called distribution.Īn internal combustion engine requires a fuel-air mixture that, when burned, moves the engine mechanisms. An engine needs a means to distribute intake and exhaust gases, to control and move them through the collector to the intake manifold, combustion chamber and exhaust manifold. In this issue we will talk about intake and exhaust valves, however, before entering into specifics, we will contextualize these elements for a better understanding.
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