Banging of the fuel air mixture inside the combustion chamber makes the piston reciprocate which helps the motorbike to roll. As we all know, piston inside the combustion chamber here plays an important role as it rotates the crankshaft. Simply saying, above the piston, the fuel air mixture will be burning which forces the piston down and below the piston where all the internal components will be functioning and also gets lubricated.
Here only, the piston rings comes to action. It prevents the leakage of the fuel air mixture escaping to the crankcase and it also helps in building up the required pressure for the combustion to happen. In the piston, two rings will be present namely the compression rings and the oil rings. Compression rings does the above mentioned job and the oil rings does the job of swiping the motor oil throughout the cylinder wall to reduce the overall friction produced.
Have you ever noticed the gaps which is present on the piston rings doing the all those above mentioned jobs? In every reciprocating type Internal Combustion Engines (ICE), we can able to see these piston rings where the gaps will be present. Today in this post, let's see something about the gaps present on the piston rings.
Generally we know that, all the metal components expands at high temperature and it is know as thermal expansion. We can able to see this in our day to day life. For example, we can take the railway tracks where the gaps will be left in between the each rails. During the summer season, the temperature will be higher compared to any other season. At that time, the rails will expand more. That's the reason for providing the space in between the rails where it allows to expand. If there's no space, it'll make the rail to bend at the sideways which results in the derailment.
This is also the reason why the piston rings have space at the end. When the engine temperature is that of the ambient temperature, the gap will be more. Once the engine is warmed up and starts to work under the load condition, the gap present in the piston ring starts to decrease as thermal expansion takes place. I think now you can able to understand the purpose of the gaps in the piston rings. There's also another reason which is to be noted. While fitting the piston inside the bore using rings compressor, the ring has to compress as it have to enter into the bore. Once entered, after removing the ring compressor, it expands automatically thus coming to the correct position.
If we give more load to the engine, the ring expands more and if both the tips touch one another, it'll create more problems. As both the tips touches, the friction will be increased resulting in the power loss. If this happens again and again more, there are also chances for the piston getting seized in the bore. You may think that the problem will be rectified by increasing the gap. But, blow by loss occurs if the gap becomes more.
During the power stroke, the combustion products leaks through the piston rings from the combustion chamber to the crankcase. This results in the power loss and also decreases the compression of the engine as the fuel air mixture escapes during the compression stroke. Material in which the piston ring has been made plays an important role here. The manufacturer design the piston rings referring the various parameters like elongation, thermal expansion etc.. which also differs from vehicle to vehicle.
As I said previously, two types of rings will be present namely oil and compression rings. Depending upon the design and other parameters of the engine, the number of rings used will vary from one manufacturer to the other. In most of the vehicles, first two rings will be the compression ring and the last one will be the oil ring. The gaps in both the compression rings also differs as the first compression ring experiences more heat and the second ring experiences less heat compared to that of the first ring. So, the manufacturer designs the ring and provides the gap according to that.
Here only, the piston rings comes to action. It prevents the leakage of the fuel air mixture escaping to the crankcase and it also helps in building up the required pressure for the combustion to happen. In the piston, two rings will be present namely the compression rings and the oil rings. Compression rings does the above mentioned job and the oil rings does the job of swiping the motor oil throughout the cylinder wall to reduce the overall friction produced.
Have you ever noticed the gaps which is present on the piston rings doing the all those above mentioned jobs? In every reciprocating type Internal Combustion Engines (ICE), we can able to see these piston rings where the gaps will be present. Today in this post, let's see something about the gaps present on the piston rings.
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Generally we know that, all the metal components expands at high temperature and it is know as thermal expansion. We can able to see this in our day to day life. For example, we can take the railway tracks where the gaps will be left in between the each rails. During the summer season, the temperature will be higher compared to any other season. At that time, the rails will expand more. That's the reason for providing the space in between the rails where it allows to expand. If there's no space, it'll make the rail to bend at the sideways which results in the derailment.
This is also the reason why the piston rings have space at the end. When the engine temperature is that of the ambient temperature, the gap will be more. Once the engine is warmed up and starts to work under the load condition, the gap present in the piston ring starts to decrease as thermal expansion takes place. I think now you can able to understand the purpose of the gaps in the piston rings. There's also another reason which is to be noted. While fitting the piston inside the bore using rings compressor, the ring has to compress as it have to enter into the bore. Once entered, after removing the ring compressor, it expands automatically thus coming to the correct position.
If we give more load to the engine, the ring expands more and if both the tips touch one another, it'll create more problems. As both the tips touches, the friction will be increased resulting in the power loss. If this happens again and again more, there are also chances for the piston getting seized in the bore. You may think that the problem will be rectified by increasing the gap. But, blow by loss occurs if the gap becomes more.
During the power stroke, the combustion products leaks through the piston rings from the combustion chamber to the crankcase. This results in the power loss and also decreases the compression of the engine as the fuel air mixture escapes during the compression stroke. Material in which the piston ring has been made plays an important role here. The manufacturer design the piston rings referring the various parameters like elongation, thermal expansion etc.. which also differs from vehicle to vehicle.
As I said previously, two types of rings will be present namely oil and compression rings. Depending upon the design and other parameters of the engine, the number of rings used will vary from one manufacturer to the other. In most of the vehicles, first two rings will be the compression ring and the last one will be the oil ring. The gaps in both the compression rings also differs as the first compression ring experiences more heat and the second ring experiences less heat compared to that of the first ring. So, the manufacturer designs the ring and provides the gap according to that.
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