Mechanical and Electronic Injection Details about Marine Aeronautical Engine

Mechanical and Electronic Injection
Many configuration of fuel injection have been used over the past century (1901-200)
Most present day disel engine make use of a camshaft, rotating at half crankshaft speed, lifted mechanical single plunger high pressure fuel pump driven by the determines the timing of each injection. These engines use injectors that are very precise spring-loaded valves that open and close at a specific fuel pressure. Separate high-pressure fuel lines connect the fuel pump with each cylinder. Fuel volume for each single combustion is controlled by a slanted groove in the pluger which rotates only a few degreasing the pressure .

Both mechanical and electronic injection systems can be used either direct or indirect injection configurations. A cheaper configuration on high-speed engines with fewer than six cylinder is to use axail-piston distribution pump, consisting of one rotating pump plunger delivering fuel to a valve and line for each fcylinder.

Many modern systems have a single fuel single pump which sullies fuel constantly at high pressure with a common rail to each injector. Each has a solenoid has a solenoid perated by an electronic control unit, resulting in more accurate contiol of injection opening times that depend on other control conditions.Older diesel engines with meachanical injection pumps could be inadvertently run in revers allbeit very inefficiently. When this occurs, massive amounts of soot are ejected from the air intake .