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What is the compression ratio of the Fit engine?

1Answers
DelJude
09/01/2025, 11:49:59 PM

The compression ratio of the Fit engine is 11.5. The compression ratio refers to the degree to which the engine's mixed gas is compressed, expressed as the ratio of the total cylinder volume before compression to the cylinder volume after compression. Below is an introduction to compression ratio: 1. The compression ratio is closely related to engine performance. Generally, a low compression ratio refers to a ratio below 10, while a high compression ratio is above 10. Relatively speaking, the higher the compression ratio, the greater the engine's power. 2. When the compression ratio is 2:1, assuming the intake pressure is the normal 1 atmosphere (0.1Mpa), after a 90mm intake stroke, 499.5ml of mixed gas enters the cylinder. After the compression stroke, the pressure is 0.2Mpa. After complete combustion of the fuel in the cylinder under adiabatic conditions, with the temperature and pressure increase rate set to 5 times the initial value (1Mpa), subtracting the opposing 1 atmosphere (0.9Mpa), the converted pressure is 90N/cm2.

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