Does the impeller of a diesel engine react to engine heat?

The impeller of a diesel engine, typically found within the context of a turbocharger, does not directly react to engine heat in the sense of physical deformation or changes due to temperature. Instead, the function of the impeller is primarily to compress air in order to increase the engine's efficiency by delivering more air into the combustion chamber.

Heat does affect the engine's overall performance and can influence the operation of related components, but the impeller itself is designed to operate within a specific temperature range and is constructed of materials that can withstand the heat produced in the combustion process. Therefore, its primary role isn’t to react or change in any significant way due to engine heat.

Choices that suggest the impeller reacts to heat, operates only under pressure, or depends on engine speed introduce conditions that are not characteristic of the impeller's basic function in continuous operation. The main takeaway is that the impeller itself is a mechanical component designed for consistent performance regardless of the variations in engine heat.