The difference between L28/32 diesel engine parts on marine high and low medium speed engines

The differences between marine diesel engine parts and marine high and low speed engines are as follows:

1. General marine engines belong to the category of low-speed engines. The engine speed is generally below 800rpm (except for special speedboats), because the marine engine needs to match the propeller, and the propeller speed is around 600-800rpm. Considering the matching efficiency value, too high engine speed is of no benefit to this; other large cargo ships or cruise ships use engines that burn heavy oil (the worst oil). This kind of engine is generally a two-stroke low-speed engine, of course, there are High-power four-stroke medium-speed engines, medium-speed engines are generally used as auxiliary engines on ships for power generation and other purposes.

2. The car engine is more general. General commercial vehicles (heavy trucks) and construction machinery vehicles are mainly diesel engines, mostly six-cylinder four-stroke compression ignition. Passenger cars (cars, etc.) are generally gasoline engines (except for special off-road vehicles), which need to be ignited by spark plugs. The engine structure varies with different displacements.