Increasing the compression ratio in an engine affects internal engine parts how?

Increasing the compression ratio in an engine significantly impacts the internal components by increasing the loads and stresses. When the compression ratio rises, the air-fuel mixture is compressed to a smaller volume before ignition, which leads to higher pressure and temperature in the combustion chamber. This condition creates greater forces acting on the pistons, connecting rods, and other components during the combustion process.

As these parts work harder to withstand the elevated pressure and temperature, there is an increase in mechanical stress and potential for wear. Therefore, engine components must be designed or selected to handle these higher demands, making it crucial for engineers to consider the effects of a higher compression ratio on the durability and reliability of engine parts.

Although improved fuel efficiency can be an effect of a higher compression ratio, the primary and immediate concern regarding internal engine parts is the increased loads and stresses they will experience during operation.