All of this reinforcement means that there is a much heavier rotating mass, which is more difficult to spin at high RPMs, so diesel engines tend to be low RPM power plants.Īs with any internal combustion engine, the more air and fuel that can enter the combustion chamber, the more power it will produce. Because of the high compression pressures, mechanical parts must be strengthened to handle such loads: connecting rods are larger, crankshafts are stronger, and pistons are bigger. The combustion pressures are very high due to the high compression ratios needed to ignite the mixture. Diesel fuel is atomized as it enters the combustion chamber and upon compression (with only residual heat) the air/fuel mixture lights off. Whether it is a semi truck or a generator set, turbocharged diesel engines are typically large displacement, low operating RPM power plants. The principals of their operation are the same and their plumbing of intake air and exhaust gases are the same, but where the real issues come into play are the combustion pressures and temperatures, operating RPM range, and the driving cycle. We'll see if we can shed some light on the subject. There is much confusion about turbos and their use on diesel engines compared to their use on gasoline engines. WC Engineering > Technical Articles > Diesel vs.
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