L28/32 Diesel Engine parts introduces the differences between diesel engines and gasoline engines

1, compression ratio is different:

The compression ratio is the ratio of the volume of gas in the cylinder before and after compression. The engine burns by mixing air with fuel, converting heat energy into mechanical energy, which drives the equipment. Because diesel does not knock, it can withstand a higher compression ratio than gasoline (generally, gasoline engine 8~ 10:1, diesel engine 16~ 20:1), so the efficiency is also high.

2, crankshaft speed is different:

Gasoline engine is generally 5000r/m, diesel engine 3000r/m;

Compared with diesel engine, gasoline engine has lower power, smooth operation and less noise. Light weight, small size; The distance between the journal and the bearing shell is small (general, gasoline engine 0.05mm, diesel engine 0.2mm).

3. Different emissions:

Marine diesel engine accessories Gasoline engine emissions are mainly HC, CO, NOX, diesel engine is mainly NOX, PM, HC, CO.

Compared with gasoline engines, the HC and CO emissions of diesel engines are quite low, generally only one tenth of gasoline engines, and the NOX emissions of diesel engines are also comparable to gasoline engines, but diesel particulate emissions are about 30 times to 80 times that of gasoline engines.