How diesel the fuel system differs from the gasoline system

In a diesel engine the fuel is sprayed into the combustion chamber, the more fuel sprayed in, the more power the engine will produce. In diesel engines there are no throttle plates to limit air into the intake manifold, while gasoline engines have them. The only way to control the fuel injection is having a supply of unrestricted supply of air through the intake. In fuel injection systems, there are two major sub-systems, low pressure (supply/transfer) , high pressure (delivery) portion. The low pressure transfers fuel from the tank to the engine for use as a injection pump. The fuel is drawn by a lower pressure pump, through a series of screens and filters / water separators to the high injection pump. A bypass system brings excess fuel back to the tank. A high pressure fuel injection pump meters fuel to the cylinder in minute high pressure squirts. These fuel pulses are directed to the fuel injectors of each cylinder in the firing order of the engine. When more power and speed is desired, the fuel injection system sprays more fuel into the cylinder. When maximum speed is reached, a governor limits the delivery of fuel.