The Combustion Process in the Diesel Engine.

摘要: The Diesel engine is characterized by injection of fuel in the combustion chamber and selfignition. Both characteristics give rise to typical problems. former characteristic, i.e., with subsequent formation a combustible mixture, fundamental one. This mixture immediately preceding continuing during introduces element heterogeneity an extent unknown gasoline engines. As matter fact, one faced elements varying from pure liquid globulae deposits vapors air, condition this heterogeneous complex changing tremendous rapidity, due agitation, evaporation, combustion. result, conditions are always elusive; for instance, strength temperature flame vary continually throughout charge. has its advantage, it allows load down zero solely regulating input, which cause excellent economy under load. That, however, only advantage. Most drawbacks do come very charge, most obvious being impossibility burning e~cient[y quantity corresponding full amount oxygen available cylinder, so that power output stays behind efficient engine. A second drawback, but practice often more important one, great tendency towards incomplete combustion, causing internal troubles as well dirty foulsmelling exhaust gases. Figure 1 represents schematically charge at phase process. 2 comparably engine; difference simplicity compared Fig. obvious. may be put forward excuse still existing lack precise knowledge concerning process, now reached fortieth anniversary. Whereas today process developed point where quantitative results general validity can foretold, accept'tble qualitative analysis. For first two decades was confused picture, chemical physical considerations, ignition phenomena, space time were all mixed up. RiedleP try disentangle various problem. He suggested following picture stages process: (1) introduction fuel, (2) atomization, (3) (4) formation, (5) decomposition, (6) I t interesting note these stages, Riedler visualized time, actually exist overlap each other considerably.