There are two main internal combustion engine cycles...
Otto cycle and Diesel cycle.
Nicholas Otto, 1831-1891, invented the spark combustion four stroke cycle engine. This is the basis for our gasoline engines. Fuel and air mix outside the combustion chamber, are drawn into the combustion chamber, ignited at the correct time by a spark plug, and the burning and expanding gas pushes the piston down for a power stroke.
Rudolph Diesel, 1858-1913, invented the compression ignition engine. Air is compressed inside the cylinder until it is hot enough to cause the fuel to burn. Fuel is sprayed (injected) into the cylinder at the correct time and for the correct duration to give the desired power output. The burning and expanding gas pushes the piston down for a power stroke.
Nope, I don't know why air-fuel ratio isn't considered on a diesel. The only time it's a problem is if the engine is overloaded or there's an injector or turbocharger failure, and black smoke is a result.
Ken
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You get what you inspect
Not what you expect.
S&S Long Tube Hi-Torque Headers
TRD/Eaton Limited Slip Differential
Gibson exhaust system
Hellwig Rear Antisway Bar
Sylvania Xenarc H.I.D. X1010 Auxiliary Low Beam Driving Lights
Schaeffer Engine Oil, ATF, Differential Oil
Racor LFS22825 full-flow transmission filter
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