WELL-DESIGNED diesel engines in good repair, the author says, need not smoke while being operated on normal fuel if they are prevented from being overloaded.
Unfortunately, he points out, with many types of current injection equipment, effective prevention of overloading over the entire speed range involves a reduction of the low-speed torque; in other words, sacrificing part of the lugging ability of the engine.
The author makes the following suggestions to eliminate smoke:
For correcting a normally smoky exhaust, the smoke should first be diagnosed.
To eliminate hot smoke the mixing of the fuel and air should be improved.
To eliminate cold smoke ignition must be speeded up.