Compression ratios of diesel engines typically range between which two values?

Compression ratios of diesel engines typically range between which two values?

• A. 10:1 and 15:1
• B. 12:1 and 18:1
• C. 12:1 and 19:1
• D. 14:1 and 20:1

Answer: (C)

The compression ratios of diesel engines typically range between 12:1 and 19:1 because diesel engines are designed to operate at higher compression ratios than gasoline engines. This higher compression allows diesel engines to achieve greater thermal efficiency, which translates to improved fuel economy and power output. In the diesel cycle, fuel is ignited by the heat generated from high compression, making the engine inherently more efficient. The range of 12:1 to 19:1 captures the typical operational boundaries for most diesel engines, as some specialized or high-performance models can even exceed this upper limit. This range reflects standard construction practices and performance characteristics found in a variety of diesel applications, from light-duty vehicles to heavy machinery. Other ranges presented in the choices may not encompass the actual compression ratios used in common diesel engine designs, indicating they are less representative of standard diesel technology.

The compression ratios of diesel engines typically range between 12:1 and 19:1 because diesel engines are designed to operate at higher compression ratios than gasoline engines. This higher compression allows diesel engines to achieve greater thermal efficiency, which translates to improved fuel economy and power output.

In the diesel cycle, fuel is ignited by the heat generated from high compression, making the engine inherently more efficient. The range of 12:1 to 19:1 captures the typical operational boundaries for most diesel engines, as some specialized or high-performance models can even exceed this upper limit. This range reflects standard construction practices and performance characteristics found in a variety of diesel applications, from light-duty vehicles to heavy machinery.

Other ranges presented in the choices may not encompass the actual compression ratios used in common diesel engine designs, indicating they are less representative of standard diesel technology.