What makes a diesel engine different to a regular gas engine, and is one better than the other?

Diesel engines cannot work without oxygen, so how do diesel submarines operate when they're underwater? Their propulsion ...

Modern internal combustion engines — including those that run on diesel fuel — require a lot of special parts and systems to prevent dumping excess emissions into the atmosphere. Not only are those ...

While diesel engines don't need spark plugs, they do need air ventilation for proper combustion. This is a problem for vessels traveling underwater, such as submarines. Yet diesel submarines exist and ...