Using an external blower to clean a cylinder of combustion gases is known as what?

The term that describes the process of using an external blower to clean a cylinder of combustion gases is known as scavenging. Scavenging is a crucial process in internal combustion engines, particularly in two-stroke engines, where it refers to the removal of exhaust gases from the combustion chamber and the replacement with a fresh air-fuel mixture to optimize performance and efficiency.

During this process, the external blower assists in creating a flow that effectively pushes out the burnt gases, ensuring that the cylinder is ready for the next combustion cycle. This is important because residual combustion gases can hinder performance by reducing the efficiency of the next intake cycle.

In contrast, filtering usually refers to the process of removing specific particles or impurities from a fluid (such as air or fuel) rather than the entire combustion gas removal. Ventilation generally refers to the circulation of air, particularly in an enclosed space, but does not specifically involve the removal of combustion gases from a cylinder. Purging typically involves clearing out substances from a system but is not as directly related to the specific process of preparing a cylinder for the next cycle as scavenging is.