1. Air-Fuel Mixture Availability: Volumetric efficiency represents how effectively the engine can fill its cylinders with the air-fuel mixture during the intake stroke. A higher volumetric efficiency means more mixture enters the cylinder. Therefore, with a more efficiently filled cylinder, there is a greater potential for combustion, leading to an increase in horsepower.
2. Burn Efficiency and Expansion: With more air-fuel mixture, there's more fuel to burn during the power stroke. As a result, more energy is released through the combustion process, generating higher cylinder pressures and, consequently, more power output.
3. Compression Efficiency: A well-filled combustion chamber, as a result of high volumetric efficiency, leads to better compression of the air-fuel mixture. Higher compression increases the pressure and temperature of the mixture before ignition, resulting in more efficient combustion and increased power output.
4. Engine Performance Across the RPM Range: Volumetric efficiency can affect the engine's performance across different RPM ranges. An engine that maintains higher volumetric efficiency over a broader range of RPMs can produce more power at various engine speeds, resulting in better overall performance.
In summary, higher volumetric efficiency allows for more efficient filling of the cylinders with air-fuel mixture, leading to more efficient combustion, increased cylinder pressures, and ultimately, more horsepower output from the engine.
