The compression ratio of an engine is the ratio of the volume of the combustion chamber when the piston is at the bottom of its stroke (BDC) to the volume when the piston is at the top of its stroke (TDC). This ratio has a significant impact on engine efficiency, fuel consumption, and overall performance.
### Effects of Compression Ratio
1. **Engine Efficiency**:
- **Higher Compression Ratio**: Engines with higher compression ratios