In a diesel engine, how high does the compression of the air cause the temperature to rise?

In a diesel engine, the compression of the air is a crucial component of the combustion process. When air is compressed, its temperature rises due to the principles of thermodynamics. In typical diesel engines, the air is compressed to a very high pressure, which in turn raises the temperature significantly. The temperature can reach around 1000°F, which is well within the range required to ignite the fuel when it is injected into the combustion chamber.

This temperature is critical for efficient fuel combustion, allowing the diesel fuel to ignite without the need for a spark plug, which is a characteristic feature of diesel engines. Higher compression ratios lead to even higher temperatures. While temperatures can indeed exceed 1000°F, particularly at higher compression ratios, the choice indicating "over 1000°F" specifically aligns with the common operational parameters observed in diesel engines.