What is the primary function of compression rings?

The primary function of compression rings is to seal the cylinder and prevent gas escapes until combustion is complete. This sealing is vital for maintaining the necessary pressure within the combustion chamber, which is essential for efficient engine operation. When the engine operates, the compression rings fit tightly against the cylinder walls, creating a barrier that ensures that the air-fuel mixture remains confined during the compression stroke and the power stroke. This helps in maximizing power output and fuel efficiency while also minimizing emissions.

Understanding this function is crucial for anyone involved in marine engine maintenance and operation, as proper sealing prevents issues such as loss of power, increased fuel consumption, and greater emissions—all of which can negatively affect the performance of the vessel.