- Higher compression ratios allow for more complete combustion of the air-fuel mixture. This leads to greater extraction of energy from the fuel, resulting in improved fuel efficiency and reduced emissions.
2. Increased Power Output:
- Higher compression squeezes the air-fuel mixture more, creating a hotter and denser charge. This allows for more efficient combustion and a higher peak cylinder pressure, resulting in increased power output.
3. Reduced Detonation:
- Higher compression ratios can help prevent detonation (also known as knocking), which occurs when the air-fuel mixture ignites prematurely. By squeezing the mixture more tightly, the increased pressure and temperature help control combustion and prevent uncontrolled detonation.
4. Improved Emissions:
- More efficient combustion and reduced detonation contribute to lower emissions, including reduced carbon monoxide, hydrocarbons, and nitrogen oxides (NOx).
5. Durability and Reliability:
- Higher compression engines can sometimes be more durable and reliable, as the increased cylinder pressure helps create a stronger seal between the piston rings and cylinder walls, reducing the risk of blow-by and potential oil consumption issues.
6. Engine Size and Weight:
- Higher compression ratios can also allow for smaller engine designs without sacrificing power output. A smaller, more compact engine weighs less and contributes to improved overall vehicle performance.
However, it's worth noting that higher compression ratios also have some drawbacks, such as increased engine temperatures and potential compatibility challenges with lower-octane fuels. Engine designers must carefully consider these factors when determining the optimal compression ratio for a specific application.
