Generally, the reason for the highest thermal efficiency of diesel engine is (). A diesel engine has high calorific value. B internal combustion. C compression ignition. D B + C

Generally, the reason for the highest thermal efficiency of diesel engine is (). A diesel engine has high calorific value. B internal combustion. C compression ignition. D B + C

D
To solve this kind of problem mainly depends on experience and relevant basic knowledge, and then to guess
I only know that when the engine is hot, the diesel atomization is good, the water temperature is high, the oil temperature is high, the mechanical resistance is small, and the mechanical efficiency is high

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