What is the Compression Ratio of an Engine Directly Related to?
2 Answers
The compression ratio of an engine is directly related to the maximum and minimum swept volumes of the piston in the cylinder. Below is an introduction to the compression ratio: 1. Introduction: To describe the technical parameters of an engine, one can generally indicate them by the magnitude of power and torque. However, there are many factors that influence the output of power and torque, one of which is the engine's compression ratio. 2. Performance: The compression ratio has a significant relationship with the engine's performance. When a gasoline engine is running, it usually draws in a mixture of gasoline and air. 3. Temperature: The operating temperature is deeply related to changes in the compression ratio. There is a close relationship between the compression ratio and the combustion temperature.
As someone driving a regular family sedan, I find the engine compression ratio extremely practical—it directly affects my monthly fuel expenses. A higher compression ratio means the gasoline is compressed more intensely in the cylinders, burning more completely and naturally saving fuel. My compact car, for example, has an 11:1 compression ratio, averaging just over 6 liters per 100 kilometers. However, don’t push it too high—if the design is too tight, especially during summer highway driving, it can cause 'engine knocking' with a 'tapping' sound, leading to uneven combustion and wasted fuel. Once, when I used regular 92-octane gas, the engine acted up, but switching to higher-grade 95-octane fixed the issue. Additionally, the compression ratio affects driving feel—a slightly higher ratio delivers sharper acceleration and quicker starts. When choosing a car, I always check the compression ratio to find a balanced value that saves money and ensures peace of mind.
