1997-02-24

Study of White Smoke Reducing Techniques of Dl Diesel Engine 970314

For diesel engines, the delay of injection timing causes the white smoke due to unburned fuel in cold conditions.
To define the effective engineering against the white smoke, we studied this occurrence mechanism by observing the white smoke in the cylinder through the glass window, and quantitatively measuring some factors.
As a result, it is found that the white smoke quantity is closely correlated with the wall adhesion quantity of injected fuel, and proved that the evaporation acceleration by restraint of the fuel adhesion to the combustion chamber wall is effective to reduce the white smoke.

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