The Working Principle of a Four Step Machines

The first step is sucking fuel from the carburetor to the cylinder bore, after this step the piston moves from TDC (top dead center) toward BDC (bottom dead center) and at the same time the entry valve opens, while the exhaust valve closes tightly.

In this step, enter a mist of fuel through the entrance hole is passed on to the incoming valve and finally into the cylinder. After the process of sucking the fuel is finished and the position of the shaft are under, that's when the valve closes the entry so that the mist of fuel trapped in the cylinder.

The second step is the last step of compression fuel i.e. the shaft moves of BDC to TDC. At this stage the second valve in the State shut down the meeting so that the resulting compression of machine is good. Strong or weak energy produced is directly proportional to machine a good or bad result of compression, as well as a quantity of fuel mist who smoked in the first step.

At the time of the shaft before reaching the TDC in the end step compression, spark plugs sputtering flames and burning fuel mist so that it is making a hot high-pressure gases.

The next step is called a step or steps of work effort, at the moment the shaft moves from TDC towards BDC. In step this is the useful energy produced to run vehicles, while other measures thus require energy. At this stage the second valve is still in a State of closed meetings and just before the shaft up to the exhaust valve begins to open BDC.

The last step is a waste, at this time the shaft back moving from BDC toward the exhaust valve open and TDC while the valve entry closes the meeting. The movement of the shaft at this point serves to encourage the remaining combustion gases thrown towards the exhaust. After the end of the next stage of this exhaust step is to return to the first step to step up to this dump again repeatedly.